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FOR SALE: Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes

Item #649389963
Info: Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes

Asking Price:
CAD $40.00
Payment method: Cash, Paypal, Money Order, Money Wire, Interac/EMT
Condition: 11 - New (?)
Date Posted: Aug 02, 18 7:31am (PST)
Edited: Aug 02, 18 10:32am
About Seller: David Dov
David Dov is a premium user
North York,Toronto, ON
Canada
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NOS/NIB Vintage RCA EZ81 / 6CA4 rectifier tubes (Never used)
All tubes are in the original boxes NOS NIB.
Vintage 6CA4 (EZ81) rectifier tubes for amps like Eico, Scott, Dynaco
All tubes test as new with no leaks or shorts
All test very strong like new (never used)
All tubes test as new with no leaks or shorts
These are getting a little harder to find now especially New Old Stock
These are good for Eico/Dynaco/Scott,etc....
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
ALSO Selling vintage 1960 - 70's single 5963 + many other tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
$35.00 each + shipping

Also have Up for sale are: (2) NOS NIB MATCHING PAIR GZ34 TUBES Siemens branded RSD by Rohren Von Weltruf of Germany.
GZ34 / 5AR4 Rectifiers Tubes - RSD from Germany vintage early 1960's
Brand new in boxes
Top getters
Stamped 83T23 codes on both tubes and boxes.
Both have tested well above 100%
Never used!
$90.00 each price includes shipping to anywhere in Canada!

Also have some wonderful vintage RCA / SYLVANIA 5AR4/GZ34 Fat Boy Rectifiers @ $90.00 each
Made in USA
Sylvania 5AR4/GZ34 Fat Boy tests in the NOS range, has big grey plates and was originally branded RCA.
This rectifier gives the amp a real snappy response with lots of "push" behind the note, with the sensation that the note is more "forward."
This tube will make a difference in the performance of your amp!
This version of the 5AR4 has a very large glass envelope like a 6L6GC, that's where it got the "Fat Boy" moniker.
For those of you that are familiar with the Sylvania 6CA7 Fat Boy power tubes, it is the same size.
These are very robust tubes, have an exceptional feel and really sing.
Milspec tubes made in 1975, a fat-bottle design with huge beefy plates.
The Sylvania big bottle 5AR4 can hang with the best of rectifiers...a killer GZ34 rectifier tube when a premium tube is required.
The Sylvania big bottle 5AR4 can be considered as the second best to Mullard,
which produces a bit more sag than the Mullard and is priced less as well.
If your not happy with the Mullard' sound,then this is the tube which would make a huge difference in the performance of your amp!
These rectifier will give your amp a real zippy vivacity with lots of boost!
These rectifier tubes will make an immense disparity and proficiency performance of your amp!
This version of the 5AR4 has a very large glass envelope that's where it got the "Fat Boy name.
These are very powerful tubes, which have an phenomenal smooth tone and really sing out!
5AR4/GZ34 Fat Boy tests in the NOS range, has big grey plates and was originally branded RCA.
This rectifier gives the amp a real snappy response with lots of "push" behind the note, with the sensation that the note is more "forward." This tube makes a huge difference in the performance of your amp!
This version of the 5AR4 has a very large glass envelope like a 6L6GC, that's where it got the "Fat Boy" moniker.
For those of you that are familiar with the Sylvania 6CA7 Fat Boy power tubes, it is the same size.
These are very robust tubes, have an exceptional feel and really sing.
Milspec tubes made in 1975, a fat-bottle design with huge beefy plates.
The Sylvania big bottle 5AR4 can hang with the best of rectifiers...a killer GZ34 rectifier tube when a premium tube is required.
Payable by Cash,EMT, Canada Post money orders, Paypal +4%
$90.00 each

- (1) Valvo Made in Germany EZ81 / 6CA4 Rectifier tube $50.00

Valvo are excellent sounding vintage tubes made in Hamburg Germany
German vintage Valvo tubes are getting harder to find, get them while you still can!
Made in Hamburg Germany

Also have NOS NIB RCA EZ81 / 6CA4 Rectifier Tubes @ $35.00 each

Good solid tested rectifiers
Tube test very strong like new!
Tested very strong from 98 - 110 (a minimum good reading is 70 and higher)
No gas leaks or shorts!
Tube tested on a B&K Dyna Jet tube tester
VERY GOOD LONG LIFE EXPECTANCY!

We have many 6X4 + 6X4W + 6X4WA (EZ90 / 6202)
6X4 / EZ90 / 6202 all test very strong rectifier tubes.
Choose from: G.E. / HIT-RAY / MARCONI / SYLVANIA / RCA / ROGERS / WESTINGHOUSE
From $25.00 each tube including shipping to anywhere in Canada!
Usually ships within 24 hours.


Selling vintage 1960's single 5963 tubes
NOS (New old stock)
All were made in USA
No leaks or shorts
$35.00 each tube

Also have some very RARE NOS/NIB 6E5 General Electric tuning magic eye tubes
6E5 = VT-215 = 6Z-6E5 = UZ-6E5 = 6E5_Japan = CV1906
G.E. + WESTINGHOUSE TUBES Condition: NOS/NIB Never used!
Description:
Tube Type / Number: 6E5
Actual Brand*: G.E.
Quantity of Tubes: 6
Country of Manufacture: Canada
Year Made: Sept 1963
5960.21.100.3434
Lettering Condition: 80%
Plate Construction: Silver Ribbed
Getter Construction: Bottom
Number of Mica Spacers: 2
Mica Shape: U
Clear Glass
Engraved Base
(NIB) Original Boxes Included
$25.00 each or trade?

A Look At A NOS 6E5 Magic Eye Tube - YouTube
Video for 6e5 magic eye tube
▶ 14:37
https://www.youtube.com/watch?v=kgm6Kwi24KA

*Also have several 35W4 and 35Z5 GT half Wave Rectifier Tubes @ $17.00 each or trade ???
35Z5GT/G @ The Valve Museum
www.r-type.org/exhib/aaa0889.htm

Also clearing out many assorted brands of vintage 1950 -60's
ECC82 / 12AU7 + ECC83 / 12AX7 ECC81 / 12AT7 tubes
Both Black + Grey Long/Short Plates are available
Mostly are Jan G.E. / Marconi / RCA / Sylvania / Westinghouse
Both short or long grey + black plates are available.
Test strong like new with very closely matched sections.
All have had very little use.
Lettering and logo prints are all excellent!
All these vintage tubes still do test very strong, like new /very close!
All tubes have been tested twice on my mutual conductance calibrated B+K tester
They will test at or close to new.
No gas leaks or shorts.
Each shipped tube is bubble wrapped and well boxed!
Price is from $25.00 per tube !
Cash, EMT, Canada Post Money orders preferred
PayPal + 4%
1-4 tubes are the same $19.00 shipping cost by Canada Post regular parcel service at buyer's expense
*All orders of $160.00 or more will be shipped Free to anywhere in Canada!

Time to clear out some more tubes!

12AT7 / 12AU7 Tubes BALDWIN / GE / PHILIPS / RCA / ROGERS / SYLVANIA / WESTINGHOUSE

mostly from $25.00 each

Also some vintage 1960-70 tubes:

12AU7 Tubes

12AT7 Tubes

12BY7 Tubes

12AU6 Tubes

12AV6 Tubes

12AT6 Tubes

12BA6 Tubes

12BEG Tubes

12BY7 Tubes

From $25.00 each


The 12AU7, 12BH7, and 6CG7 have very similar electrical characteristics and can usually be substituted for each other.

12AU7 is identical to a 6CG7 electrically and in the circuit it will function identically. However, there is a different heater pin out.
So if you are substituting you need to make a change.
In addition, the 6CG7 draws twice as much heater current so be sure that this will work in your circuit. (This may be one reason it is not as popular as it should be.)

12BH7 requires no circuit modification to substitute for a 12AU7, but the plate resistance is a little lower (5300 vs 7700).
Thus, even though it has a lower u (or amplification factor), the gain may be slightly higher depending on the circuit design.
[This is mainly true for circuits that use an anode resistor load.]
It will also draw a little more current, but the 12BH7 is a beefier tube and can handle it.
For most circuits this should be well within the tolerances of the design, but you can ask the manufacturer to be sure.
With respect to audio reproduction there is a fairly large difference between these three tubes.
The 6CG7 (or 6FQ7 which is the same exact tube) is identical in internal construction to the 6SN7. The 6SN7 has the reputation of being the most linear of the medium mu triodes and the 6CG7 follows suit.
Also, the 6CG7 line is remarkably similar in audio performance across various manufacturers of the same vintage or age.
It is a good tube for early or middle stage amplification and has the added bonus of a grounded shield between sections, which reduces hum and increases channel separation.

The 12BH7 can lend a wonderful life to the tone that sounds great for jazz or vocals. For audio listening, this tube can temper the harshness of CD's.
There is, however, a wider variation in the sound of 12BH7s than 6CG7s, so some tube selection or rolling is in order.
You can find very neutral 12BH7s (watch for a coming blog comparing them) . If you don't want to modify the circuit and are unhappy with your 12AU7--this is a good choice.

The 12AU7 family has the widest variety of tonal characteristics which is probably why this tube is rolled so often by audiophiles.
Personally I find some 12AU7s a little tinny in comparison with the 12BH7 and 6CG7, but there are exceptions,such as RCA clear tops and 5963 tubes!

Part of the fun and magic of tubes is rolling them when listening to different types of music.

All single tubes from $20.00 each
Tubes are bubble wrapped and securely well packaged for shipping!
Payment is only by;EMT Interac money transfers, Cash,Canada Post money gram/orders
Paypal + 4


**Please read my CAM profile re: shipping policies


Many vintage pairs of 12AT7 + and 12BY7 tubes @ $50.00 a pair!

HP-AMPEREX*G.E.*PHILIPS*RCA*ROGERS*SYLVANIA*WESTINGHOUSE

All tubes have tested very good!
No leaks or shorts

Many pairs of 12AT7 + 12BY7 vintage tubes available

If you are going to roll pairs in your Amp / Pre amp then these are the tubes for you!

All testing very good and most were never used and as good as new!

Also have matching pairs of:

A pair of 12AU7-----50.00
A pair of 6ML8------35.00
A pair of 6AN8------ 60.00
A pair of 6BL8-------35.00
A pair of 6AU8-------35.00
A pair of 6GH8-------35.00
A pair of 6U8A-------35.00
A pair of 6AT6A----- 35.00
A pair of 6AT8A----- 35.00


I also have many more tubes then I need
Most of these tubes for vintage amps,pre-amps,tuners testers and other vintage gear. All tubes have been recently tested using a Jackson 658 tester,and all these have no leaks/shorts!
All tubes are NOS,some are also NIB
Kindly email me for any information and for prices.


Current updated list of available tubes:

0B2 Philips Mini Watt
0C3
4BQ7A
6AB4
6AQ5
6AQ8
6BQ7A
6BQ5/EL84
6AX8
6BN6
6AU6
6AV6
6BN4A
5763
5963
6H1N
6C4
6X4
6X9
6X8
6AL5
6AK6
6AN8A
6AU8A
6CY5
6AT8A
6U8A
6GH8A
8X9
ECH81
12BY7A
12BA6
12BE6
12AU7
12AT7
12SN7
GB-5726
6BN8
6BG6GTB
6CU6
12AH7GT
EF86
EF89
6DA6
13EM7
7591A
50BM8
UCL82 ROGERS
6J6 / ECC91 / 6N15P RUSSIAN NOS
JAN 0A3 WESTINGHOUSE NOS
JAN 0C3 VR105 NOS


Local GTA Toronto pickup welcomed.
Shipping is by Canada Post regular parcel
All orders of 4 or more tubes is free to anywhere in Canada!
All tubes will be properly well wrapped,packed and bubble-wrapped boxed.

If you are going to roll pairs in your Amp / Pre amp then these are the tubes for you!

All testing very good and most were never used and as good as new!
Tubes are bubble wrapped and securely well packaged for shipping!
Payment is only by;EMT Interac money transfers, Cash,Canada Post money gram/orders
For shipping add $18.00 per packed parcel to anywhere in Canada

Also we have these 12AT7 RCA Black Plate tubes are designed to be used as an amplifier or it can be combined as an oscillator and mixer
(as long as the frequencies are below 300MHz.)
The RCA brand are the higher quality tubes.
The 12AT7 has a mu factor of 60.
Each triode section of the tube acts as a class A amplifier.
Because of this, the tubes can be used in microphone preamplifiers, instrument amps, and recording equipment that is equipped with vacuum tubes. The tube features a double triode with separate cathodes, and because of their design, they are low noise.
They requires a noval nine-contact socket, but can be mounted in any position.
Nice and quiet,excellent tone, dynamics and clarity!
Test strong!

Up for sale is (1) single Mullard Bausch & Lomb 12AX7/ECC83 10 series tube.
This tube is in very good and strong working and cosmetic condition.
Pins are clean!
Some of the yellow screen prints have slightly rubbed off.
This tube is genuine used old stock made in Great Britain.
This is a medical grade tube as it was made for Bausch & Lomb.
The 10M series are supposed to be good for 10,000+ hours of operation.
The Mullard B&L 12AX7/ECC83 10 series tubes,
are told to have the most quiet background in their class,
and produce excellent detail, warm and sweet sound with a lovely mid range.
You will hear every note, each and every musical instrument!
I hate to let it go but I have way too many tubes still more then I'll need.
Please examine the photos as they are part of the description.
Payable by Cash, EMT-Interac, Canada Post Money Grams
PayPal +4%
Buyer pays for shipping all orders under $159.99
Seller pays for shippping on all orders $160.00 or more!


Bubble wrapped and boxed to allow most securely packaged for safe arrival.
Tested on my B+K tube tester with all good strong readings
No gas or shorts
GTA Toronto CASH pick-up is always welcome!

Shipping available at buyers expense which usually is $20.00/Quad to anywhere in Canada
Payment is only by;Cash,Canada Post money gram/orders,EMT/money transfers are preferred.
For shipping +$20.00 to anywhere in Canada on all orders less then $160.00
*Free shipping on orders of $160.00 or more!

These are excellent musical tubes
All sales final
No exchange/No returns

NOS/NIB 6E5 General Electric tuning magic eye tubes
6E5 = VT-215 = 6Z-6E5 = UZ-6E5 = 6E5_Japan = CV1906
G.E. + WESTINGHOUSE TUBES Condition: NOS/NIB Never used!
Description:
Tube Type / Number: 6E5
Actual Brand*: G.E.
Quantity of Tubes: 6
Country of Manufacture: Canada
Year Made: Sept 1963
5960.21.100.3434
Lettering Condition: 80%
Plate Construction: Silver Ribbed
Getter Construction: Bottom
Number of Mica Spacers: 2
Mica Shape: U
Clear Glass
Engraved Base
(NIB) Original Boxes Included
$35.00 each includes shipping to anywhere in Canada

A Look At A NOS 6E5 Magic Eye Tube - YouTube
Video for 6e5 magic eye tube
▶ 14:37
https://www.youtube.com/watch?v=kgm6Kwi24KA



*Also have several 35W4 and 35Z5 GT half Wave Rectifier Tubes @ $12.00 each or trade ???

35Z5GT/G @ The Valve Museum
www.r-type.org/exhib/aaa0889.htm

Best offer or trade:
4 x Marconi 6AV5 GA Output tubes @ $80.00 for all 4 tubes including shipping to anywhere in Canada!


Also have some NOS/NIB Vintage RCA EZ81 / 6CA4 rectifier tubes (Never used)
All tubes are in the original boxes NOS NIB.
Vintage 6CA4 (EZ81) rectifier tubes for amps like Eico, Scott, Dynaco
All tubes test as new with no leaks or shorts
Each tube = $40 + shipping
All test very strong like new (never used)
All tubes test as new with no leaks or shorts
These are getting a little harder to find now especially New Old Stock
These are good for Eico/Dynaco/Scott,etc....
$40.00 each
Prices are in Canadian dollars

ALSO FOR SALE: Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
ALSO FOR SALE: Vintage Electrohome UltraLinear 6BQ5B / 7189 MONO TUBE POWER Amplifier FOR SALE

ALSO FOR SALE or TRADE: Selling vintage 1960 - 70's single 5963 + many other tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
FOR SALE: Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
Asking Price:
CAD $40.00

I have many ECC81 / 12AT7 / 6201 / 6414 tubes
Many are black plates
These are military spec. ECC81 / 6201 / 6414 / 12AT7 Variants
Also several are the harder to find rare triple mica
Very ultra-quiet low noise microphonics
Payable by Cash, EMT-Interac, Canada Post Money Grams
PayPal +4%
Buyer pays for shipping all orders under $159.99
Seller pays for shippping on all orders $160.00 or more!
I have much more then I need, given I'm now downsizing (seems to happen with us seniors....)
All test strong
No shorts or leaks!
Many singles,pairs,quads.
Priced to sell:
Please email for available brands + prices
I also have many other tubes to sell,so let me know what you need.
All tubes have tested very good on my Calibrated B+K Tester with good readings of min. 80 - 100
All without any gas shorts
I'm now selling off from my collection.
as I have much more then I need, given I'm downsizing (seems to happen with us seniors....)
Many are the much harder to find rare Triple mica Black plates....
All tubes have tested like new and very good on my Calibrated B+K Tester with good readings of min. 80 - 100
All without any gas shorts

NOS/NIB 6E5 General Electric tuning magic eye tubes
6E5 = VT-215 = 6Z-6E5 = UZ-6E5 = 6E5_Japan = CV1906
G.E. + WESTINGHOUSE TUBES Condition: NOS/NIB Never used!
Description:
Tube Type / Number: 6E5
Actual Brand*: G.E.
Quantity of Tubes: 6
Country of Manufacture: Canada
Year Made: Sept 1963
5960.21.100.3434
Lettering Condition: 80%
Plate Construction: Silver Ribbed
Getter Construction: Bottom
Number of Mica Spacers: 2
Mica Shape: U
Clear Glass
Engraved Base
(NIB) Original Boxes Included
$35.00 each includes shipping to anywhere in Canada

A Look At A NOS 6E5 Magic Eye Tube - YouTube
Video for 6e5 magic eye tube
▶ 14:37
https://www.youtube.com/watch?v=kgm6Kwi24KA



*Also have several 35W4 and 35Z5 GT half Wave Rectifier Tubes @ $12.00 each or trade ???

35Z5GT/G @ The Valve Museum
www.r-type.org/exhib/aaa0889.htm

Also have tubes from $25.00 each
Various vintage rectifier tubes of G.E.*Hit-Ray*Philips*RCA*Raytheon*Rogers*RSD*Sylvania*Westinghouse*Viking

6C4
6V4
6X4
6X8
6X9
8X9
EZ80 - 6X4
EZ81 - 6CA4
5Y3
5VG GT



5AR4 / GZ34 Mullards from $80.00 each


Also have (2) Fat Boy 5AR4 GZ34 tubes for sale.
Made in USA
All test strong
No leaks or shorts
$100.00 each

All tubes are fully functional.
No shorts or gas leaks
Tested on my B&K tube tester.
Cosmetic condition is very good

Also have some NOS/NIB Vintage RCA EZ81 / 6CA4 rectifier tubes (Never used)
All tubes are in the original boxes NOS NIB.
Vintage 6CA4 (EZ81) rectifier tubes for amps like Eico, Scott, Dynaco
All tubes test as new with no leaks or shorts
Each tube = $40 + shipping
All test very strong like new (never used)
All tubes test as new with no leaks or shorts
These are getting a little harder to find now especially New Old Stock
These are good for Eico/Dynaco/Scott,etc....
$40.00 each
Prices are in Canadian dollars

ALSO FOR SALE: Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
ALSO FOR SALE: Vintage Electrohome UltraLinear 6BQ5B / 7189 MONO TUBE POWER Amplifier FOR SALE

ALSO FOR SALE or TRADE: Selling vintage 1960 - 70's single 5963 + many other tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
FOR SALE: Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
Vintage NOS/NIB RCA EZ81 - 6CA4 tube rectifiers + many other vintage tubes
Asking Price:
CAD $40.00

NOS Mullard 6EU7 + 6AU6 tubes.
Made in Great Britain
Test strong like new on my B+K tester.
No gas or shorts
$80.00/pair


Excellent sounding 12BH7 / 12BY7 / 12AU7A / 12AT7 / 12AX7 single tubes from $25.00 each!
Many of these are selected organ grade tubes are a great value!
Tested on a calibrated B+K tester with no gas or shorts.
All have tested very strong!
Price is $25.00 each
GTA cash pick up is at Finch + Dufferin area
North York, Toronto


Also have some very nice and well balanced 1960's GE 5814A tubes
Made in USA.
GE 5814A triple mica tubes 12AU7
These are the very desirable triple mica version.
Tubes are all matched with 5%
It is a very good upgraded variant substitution for 12AU7 tubes.
All tubes tested on my B+K tube tester with no leaks or shorts.
Tubes all measure between 2300 and 2500 where minimum on this tubes is 1175.
New tubes measure around 2200.
Selling for $80.00 a pair INCLUDES SHIPPING TO ANYWHERE IN CANADA!
.

*Also have some very nice and quiet 5963 which is a MEDIUM-MU TWIN TRIODE. 9—PIN MINIATURE TYPE
Very little is written about these 5963 tubes.
It's practically today unknown, yet these are excellent fantastic replacements for 12AU7 tubes!
Smooth and sweet,yet bargain priced compared with many European brands!
Very smooth tube from top to bottom with no weakness!
These are a nice industrial/military upgrade variant type which is nearly identical to the standard 12AU7.
RCA made a nice black plate version of this tube
The 1950’s RCA 5963 sounds more dynamic than the standard 12AU7 Blackplate
It’s also a very good low-noise tube.
GE has it in their broadcast line.
The plate voltage rating is a little lower than for a 12AU7, but for most applications, it will work fine.
It has a rugged cathode and should be quite long lived, similar to the 5814.
That specially-designed cathode is said to withstand long periods of time in cut-off without damaging the tube (cathode poisoning).
This made them a great choice for NORAD computers, which led to a good supply of them on the USA West Coast.
Use them and you will marvel at the quality and value.
They are dead-silent and seem to have an unusually long lifespan.
Very satisfied with the sound they produce.
A truly fine 12AU7 variant from the 1950's, many tube audiophiles feel these can outperform most other NOS 12AU7 tubes!
In computer (and some other) service, tubes were quite often operated as switches, biased to cutoff (no plate current) for long periods of time and then turned on, while always the heater and cathode were warmed up and ready to go.
In ordinary tubes, this leads to a condition known as "cathode interface resistance" or "sleeping sickness."
The cathode interface is a layer of metal, usually nickel, between the cathode sleeve and the oxide coating that emits electrons. In ordinary tubes, under conditions of long-duration tube cutoff, it generates a growing resistance until at last the cathode "goes to sleep."
Computer tube cathodes were specially treated to survive those long periods of cutoff without developing cathode interface resistance

5963 tubes (12AU7 variants) from $30.00 each

G.E. short grey plates @ $30.00 each
HP / Amperex short plates @ $30.00 each
RCA grey short plates @ $30.00 each
RCA black plates @ $40.00 each

Also have some Made-in the-USA, RCA 12AU7 black plate tubes in very good condition.
Very lightly used! (used/burned in for 10 hours)
Barely broken-in.
Usually sell for over $100.00 Cdn) each
You can have them at $75.00 Cdn each.or $140.00/pair!

Shipping anywhere in Canada is $18.00 per each order of 1-4 tubes
Payable by: Cash, Canada Post Money Gram, Interac/EMT, Paypal + 4%

*Also have some very nice and quiet 5963 which is a MEDIUM-MU TWIN TRIODE. 9—PIN MINIATURE TYPE
Very little is written about these 5963 tubes.
It's practically today unknown, yet these are excellent fantastic replacements for 12AU7 tubes!
Smooth and sweet,yet bargain priced compared with many European brands!
Very smooth tube from top to bottom with no weakness!
These are a nice industrial/military upgrade variant type which is nearly identical to the standard 12AU7.
RCA made a nice black plate version of this tube
The 1950’s RCA 5963 sounds more dynamic than the standard 12AU7 Blackplate
It’s also a very good low-noise tube.
GE has it in their broadcast line.
The plate voltage rating is a little lower than for a 12AU7, but for most applications, it will work fine.
It has a rugged cathode and should be quite long lived, similar to the 5814.
That specially-designed cathode is said to withstand long periods of time in cut-off without damaging the tube (cathode poisoning).
This made them a great choice for NORAD computers, which led to a good supply of them on the USA West Coast.
Use them and you will marvel at the quality and value.
They are dead-silent and seem to have an unusually long lifespan.
Very satisfied with the sound they produce.
A truly fine 12AU7 variant from the 1950's, many tube audiophiles feel these can outperform most other NOS 12AU7 tubes!
In computer (and some other) service, tubes were quite often operated as switches, biased to cutoff (no plate current) for long periods of time and then turned on, while always the heater and cathode were warmed up and ready to go.
In ordinary tubes, this leads to a condition known as "cathode interface resistance" or "sleeping sickness."
The cathode interface is a layer of metal, usually nickel, between the cathode sleeve and the oxide coating that emits electrons. In ordinary tubes, under conditions of long-duration tube cutoff, it generates a growing resistance until at last the cathode "goes to sleep."
Computer tube cathodes were specially treated to survive those long periods of cutoff without developing cathode interface resistance

5963 tubes (12AU7 variants) from $30.00 each


G.E. short grey plates @ $30.00 each
RCA grey short plates @ $30.00 each
RCA black plates @ $40.00 each
HP-AMPEREX @ $40.00 each


Also selling of some 12BY7 tubes
Singles for $30.00
Selling for $50/pair.
Shipping to anywhere in Canada please + $14.00


ATTENTION all CAM member tube shoppers...
Finding the right tube for your amp/pre amp,you will find that there will be a lot of different opinions ....
Many times all the answers are right.
The complications can be is some tubes can be very system dependent so it will depend on your system as to which tubes sound the best.
We all desire quiet nice sounding tubes.
Why are some tubes noisier then others,or quieter in certain amps and not in others?
Audio tubes need to settle in and then will get better once burned in.
Definitely buy from a reputable dealers!
If you're going to be into tubes, its always beneficial to develop a relationship with dealers you can trust.
If you want to find the best sounding tube for your system and don't mind spending $$, then buy several brands/types and listen for yourself.
Each brand tends to feature characteristics that may appeal to you and match well with your unit, others not so much so there really isn't one 'best-sounding' tube out there as its very dependent on the application.
Also, while these super rare and uber-expensive tubes do sound great, they're best implementation is in sensitive pre amps and phono stages Remember, a good portion of their cost can be attributed to their scarcity, not just their sonics.
They really don't stand out in the usual amplifier's driver stage and in most other gear, a similar but substantially more common NOS tube of the same manufacturer will provide all but maybe the last 1% of the sonics of the super tubes at a much lower price.
Although improving, still many of the new tubes made today in Europe, China and Russia only reproduce random varied harmonics.
This can be why most of us upgrades to a vintage made tube made decades ago when these rare inner earth metals were available in the inside construction of the vintage tube.
These metals have become too expensive to use and today’s tube makers have found cheaper substitutes which seem to work but do not reproduce all the nuances and textures in music! ...

Also have 4 x Marconi 6AV5 GA Output tubes @ $80.00 for all 4 tubes including shipping to anywhere in Canada!

Clearing out many assorted brands of vintage 1950 -60's
ECC82 / 12AU7 + ECC83 / 12AX7 ECC81 / 12AT7 tubes
Excellent pairs of BALDWIN organ grade tubes, chosen for and sold to Baldwin Organ.
These date from the early 1960's.
Organ grade tubes were tooled to be very quiet musical 12AU7 tubes!
Payable by EMT, if Paypal + 4%
Price is per matched pairs @ $70.00/pair

Also we have these 12AT7 RCA Black Plate tubes @ $25.00 each
The 12AT7 has a mu factor of 60.
Each triode section of the tube acts as a class A amplifier.
Because of this, the tubes can be used in microphone preamplifiers, instrument amps, and recording equipment that is equipped with vacuum tubes. The tube features a double triode with separate cathodes, and because of their design, they are low noise.
They requires a noval nine-contact socket, but can be mounted in any position.
Nice and quiet,excellent tone, dynamics and clarity!
Test strong!

Mostly are G.E. / Marconi / RCA / Sylvania / Westinghouse
Both short or long grey + black plates are available.
Test strong like new with very closely matched sections.
All have had very little use.
Lettering and logo prints are all excellent!
All these vintage tubes still do test very strong, like new /very close!
All tubes have been tested twice on my mutual conductance calibrated B+K tester
They will test at or close to new.
No gas leaks or shorts.
Each shipped tube is bubble wrapped and well boxed!
Price is @ $25.00 per tube !
Cash, EMT, Canada Post Money orders preferred
PayPal + 4%
1-4 tubes are the same $19.00 shipping cost by Canada Post regular parcel service at buyer's expense
*All orders of $160.00 or more will be shipped Free to anywhere in Canada!

EMT / Canada Post money orders or cash
If Paypal +4%

Local GTA pickup also welcomed.
Accepted payment is by; Cash / EMT Interac Transfer / Canada Post money gram or orders
No exchange or refunds
Thanks most kindly for looking!

*Would also trade for 12AX7 tubes!
Please email for list/prices.
Tubes will be properly bubble-wrapped and packed for safe shipping to you!
Shipping extra.
Local GTA pickup welcome.
Payment is by Cash,EMT, Canada Post Money Orders,Paypal +4%
Cash/Trades on local GTA pickup

On all orders over $160.00 Shipping is Free to anywhere in Canada!
Each shipped tube is bubble wrapped and well boxed!
Very well packaged for safe shipping
**Please read my CAM profile re: shipping + payment policies
*All sales final
No returns/refunds

*Would also trade for 12AX7 tubes!

Payment is by Cash, or EMT, Canada Post Money Orders on all shipping orders
Cash/Trades on local GTA pickup
All purchases for $160.00 or more include FREE SHIPPING anywhere in Canada!
Each shipped tube is bubble wrapped and well boxed!
Very well packaged for safe shipping
**Please read my CAM profile re: shipping + payment policies
*All sales final
No returns/refunds


4 x Marconi 6AV5 GA Output tubes @ $80.00 for all 4 tubes including shipping to anywhere in Canada!

EMT / Canada Post money orders or cash
If Paypal +4%

Local GTA pickup also welcomed.
Accepted payment is by; Cash / EMT Interac Transfer / Canada Post money gram or orders
No exchange or refunds
Thanks most kindly for looking!






4 x Marconi 6AV5 GA Output tubes @ $20.00 per each tube

Also have 5AR4 / GZ34 Rectifier Fat Boy tubes!
Tests like new, has big grey plates and were originally branded PHILIPS, RCA or SYLVANIA
These rectifiers can allow the amp a very zippy response with lots of "push" behind the note, with the sensation that the note is more "forward." This tube makes a huge difference in the performance of your amp!
This version of the 5AR4 has a very large glass envelope like a 6L6GC, hence where it got the "Fat Boy" name
These tubes have a most sweet and warm snappy sound, with amazing power!
$100.00 each with shipping included to anywhere in Canada!
Payable by EMT
PayPal + 4%



Also a Marconi (Western Electric) 5R4GY USA NOS NIB.
Very rare coke bottle shaped tube
Excellent condition.
Tested on my calibrated B&K
Good from 65
Tube Tests = 95/100
Free shipping included to anywhere in Canada
$79.99
Payable by Cash, EMT,
Paypal +4%

EMT / Canada Post money orders or cash
If Paypal +4%

Local GTA pickup also welcomed.
Accepted payment is by; Cash / EMT Interac Transfer / Canada Post money gram or orders
No exchange or refunds
Thanks most kindly for looking!


Additional Information:

Jun 23, 18 1:30am
4 x Marconi 6AV5 GA Output tubes @ $20.00 per tube

Jul 21, 18 3:42pm
6J6 Tubes @ $20.00 a pair
6J6, Tube 6J6; Röhre 6J6 ID2693, Double Triode
https://www.radiomuseum.org/tubes/tube_6j6.html
Tube 6J6 or Röhre 6J6 ID2693, Double Triode, Miniatur-7-Pin-Base B7G, USA 1940 and VHF shown.
https://www.radiomuseum.org/tubes/tube_6

6J6 @ The Valve Museum
www.r-type.org/exhib/aaa0399.htm




Also have excellent sounding NOS NIB ROGERS 6AK5 / 6J1 tubes @ $30.00 each NEVER USED NEW IN BOXES!
These are direct replacement for the 6J1 tubes that are shipped with various tube buffers like Grant Fidelity and Yaqin.

Asking $30.00 per tube!

Shipping available to anywhere in Canada
Payable by; cash, EMT, Paypal

Thanks for looking

$30.00 per tube (Some are NOS / NIB, some are in original boxes)

Shipping is available to anywhere in Canada!



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