Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: jcm-jmp on June 23, 2011, 09:10:11 am

Title: phonola model 2760 console stereo
Post by: jcm-jmp on June 23, 2011, 09:10:11 am

hey guys
i have an old phonola model 2760 that i would like to use as an amp.
It works fine but i pulled the tubes in it a year or so ago and dont remember the tube types or locations. can anyone help with this,

Title: Re: phonola model 2760 console stereo
Post by: PRR on June 23, 2011, 05:09:34 pm

Waters Conley Phonola 2760 seems to be a VERY deluxe top of the line console stereo, and quite rare.

Are you sure there isn't a cheat-sheet inside the cabinet?

Title: Re: phonola model 2760 console stereo
Post by: jcm-jmp on June 24, 2011, 01:05:48 pm

it looks like what was pictured as a 2760 in a phonola ad i found on the web.
its an *8 tube unit and from what i have traced out so far i know 1 of the tubes a dual triode type. The vaules suggest any of the 12--7 type tubes.

here are a couple pics of the chasis

Title: Re: phonola model 2760 console stereo
Post by: jcm-jmp on June 24, 2011, 01:11:37 pm

power xfmr is 6102 b     9496224
2-ot's t-6101    9496224

ot's secondary's wired for a woofer between both of them, realy wierd! like a 3rd channel or bridged output of the ot's for a woofer.

There is 1-6" speaker for each side and a single 10" woofer in the cabinet.

Title: Re: phonola model 2760 console stereo
Post by: PRR on June 24, 2011, 10:08:39 pm

> There is 1-6" speaker for each side and a single 10" woofer in the cabinet.

So you do have the cabinet? And there is NO tube-chart in/on/under/inside it?

> ot's secondary's wired for a woofer between both of them, realy wierd!

Same as your 5.1 media system. You need two (or more) mid-tweeters to get "spread". You only need one woofer for the whole room.

> i pulled the tubes in it a year or so ago and dont remember

You have created a very difficult puzzle.