Up for sale is a Bogen Challenger Model CHA-75 75 Watt PA/Phono mono amp . A PA amp from the early mid 70s (This model is from 1974) BOGEN MODEL CHA 75 CHALLENGER VINTAGE TUBE PA/PHONO MONO AMP 75 Watts Made from 1974 - 77 All tubes tested good, cleaned the potentiometers and connected a speaker Everything works great ,MIC 1,2 ,Phono,Bass,Treble,Power Light Includes original booklet - schematic and one Mic plug - New Power Cord Powers Up Unit ,Connected A Speaker ,Played A Music Source Through The Phono Input, And It Worked Fine, Then I Tried A Microphone In Each Mic Input And They Both Worked Fine As Does The Bass And Treble. Also The Volume, Bass, Treble Pots are Quiet ,I Just Cleaned Them (No Static)
The tube compliment included (probably worth over $160.00 alone) is as follows:
1 x 12AX7 1 x 6AU6 1 x 6U8 1 x 6CM7 2 x 5U4 Rectifiers 4 x 6AV5GA Output tubes
These amps are great for guitar, don't pass this one up Weighs 31lbs It's being sold with all tubes included:
The front panel has separate volume controls for each input (MIC 1, MIC 2 & Phono) and a separate bass and treble/On/Off control. The back panel has an RCA type input plug for Phono or CD connection, an electric receptacle, two speaker output sockets with a 6 screw speaker terminal strip with a wire that allows you to choose G, COM, 4, 8,16 or 65 ohms plus 25v and 70v. There's also two bias adjustments on the top to independently adjust the power tubes bias (nice feature). This amp powers up fine and works with all of the tubes lighting up and the transformers stayed nice and cool during the testing. The sound is very loud from this amp!
The chassis and cage are in really good condition for its age with no rust at all and just very minor age related wear The cage and bottom plate are present and also in good shape. Includes original metal cage
It measures approximately 17" x 12" x 6 1/2" Weighing about 31 lbs.
Powers on! All very strong tested tubes (all heat up and glow perfectly) Its in pretty good shape. The previous Cam member owner of this amp gave it a 7 and I concur with him and also rate it a 7 of 10 (due to a few scratches on the upper case and a broken knob.)
Payment by: CASH,EMT, Canada Post Money orders (No Pay pal please,as we are not users). Local GTA cash pickup preferred
Bogen built and still does built systems for PA work. These amps were never meant for sound quality, mostly for max power output and cheap cost. There is a market for Vintage tube gear like these amps to be used as guitar amps,by drilling out the (2) mic inputs and installing 1/4 inch jacks These tubes are still in very good shape, they are worth splitting out and selling individually.
Will accept serious cash offer or trade for other tubes
All tubes included
Re: David Bogen Challenger Model CHA-75 6AV5 GA tube amp (75 watts)
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