> Classifieds > > > Vintage ECC81-12AT7 + ECC82-12AU7 Tubes

EXPIRED - FOR SALE: Vintage ECC81-12AT7 + ECC82-12AU7 Tubes

Item #649411783
Info: Vintage ECC81-12AT7 + ECC82-12AU7 Tubes

Asking Price:
CAD $80.00
Payment method: Cash, Paypal, Money Order, Money Wire, Interac/EMT
Condition: 9 - Excellent (?)
Date Posted: Feb 02, 18 6:30pm (PST)
Edited: May 03, 18 9:06am
About Seller: David Dov
David Dov is a premium user
North York,Toronto, ON
Canada
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Description

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Vintage 1960's ECC81-12AT7 / ECC82-12AU7 / ECC83-12AX7-7025A Tubes
All test very strong
No Gas leaks or shorts

All Tubes have been tested twice very strong (first on a B+K and also on a Western Electric KS-5727-L1 tube testers)
No gas leaks or shorts.

A pair of 12AU7A Stamped Daystrom Mullard. (Made in Britain) at the Blackburn plant with code B2L2 and B2L3.

Tubes tests show: 2200/2200 and 2350/2400.

Minimum for this tube 1385.

$160.00 /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

10 x G.E. short grey plates (1960's) @ $30.00 each
30 x RCA grey short plates (1960's) @ $30.00 each
30 x RCA black plates (1950's) @ $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!

Cash, EMT-Interac transfer preferred
Postal Money Order
PayPal buyer +4%


Additional Information:
Feb 21, 18 2:58pm
*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

10 x G.E. short grey plates (1960's) @ $30.00 each
30 x RCA grey short plates (1960's) @ $30.00 each
30 x RCA black plates (1950's) @ $40.00 each



Payment is by: Cash, Interac-EMT, Canada Post Money Orders only on all shipping orders.
Paypal +4%
Cash on local GTA pickup is available at Finch-Dufferin, North York Toronto M2R 3W1

*Free shipping is included to anywhere in Canada!

Please see my other ads for more excellent vintage audio vacuum tubes
All tube orders will be bubble wrapped and boxed, will be properly packed and marked FRAGILE to arrive very safe!

Shipping by Canada Post regular parcel
Thanks for looking.
**Please see my CAM ads


Tubes tested on a recently calibrated B&K tube tester.
1-4 tubes are the same shipping cost which is by Canada Post regular parcel service,
and is usually $18.00 to anywhere in Canada.
Minimum order is $50.00 or more
Any purchase over $160.00 and shipping is on me!
All tubes will be very well packed and wrapped with bubble wrap!

Local GTA pickup also welcome.
Accepted payment is by; Cash/EMT/Canada Post money gram or orders
Paypal +4%
Thanks for looking.



*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

10 x G.E. short grey plates (1960's) @ $30.00 each
30 x RCA grey short plates (1960's) @ $30.00 each
30 x RCA black plates (1950's) @ $40.00 each

Also have a pair of Mullard 12AX7 Tubes
Both test very strong
Stamping is about 60% worn off
$90.00/pair




Additional Information:

Feb 19, 18 9:41pm
Also have (1) Northern Electric 12AU7 mint brand new, never used in blue can box @ $45.00

Feb 21, 18 12:00pm
*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

10 x G.E. short grey plates (1960's) @ $30.00 each
30 x RCA grey short plates (1960's) @ $30.00 each
30 x RCA black plates (1950's) @ $40.00 each

Feb 26, 18 11:22am
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

10 x G.E. short grey plates (1960's) @ $30.00 each
30 x RCA grey short plates (1960's) @ $30.00 each
30 x RCA black plates (1950's) @ $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!

Cash, EMT-Interac transfer preferred
Postal Money Order
PayPal buyer +4%


Additional Information:
Feb 21, 18 2:58pm
*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

10 x G.E. short grey plates (1960's) @ $30.00 each
30 x RCA grey short plates (1960's) @ $30.00 each
30 x RCA black plates (1950's) @ $40.00 each



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