2. amps-preamps
  3. 170804-162796

RCA 9289 tube amplifiers

The RCA 9289D was the final version of this great 200W amplifier.  It features four 6550 in the output stage and an interesting power supply with OD3 regulators.  My father designed the final version of this amp for RCA and we have several available.  I'm testing the water to see if there's still a market for this excellent amp before I start recapping them, or whether folks would prefer them bone stock.

cdietze
Post removed 
cdietze OP
6 posts
 

https://app.photobucket.com/u/cdietze21/a/f76242bb-ea49-4235-9994-43003a4bed80

Hello,

Here's a link to some pictures of one of the amps.  The chassis can rotate 90 degrees from the rails for ease of service, and the meter is a handy tube checker  and line voltage monitor. 

I brought the amp up slow on a Variac and it passed sine wave. 

Tubes are:

12AU7

6SN7

4X 6550

6V6

2X OD3

2X 5R4

atmasphere's avatar
atmasphere
11,800 posts
 

I brought the amp up slow on a Variac and it passed sine wave. 

That's good! Don't keep running it until the power supply has been refurbished. Otherwise running it is a classic way that a failing filter capacitor causes a power transformer to fail.

 

jond's avatar
jond
5,807 posts
 

@cdietze I tried to look at your pics and it says your album is set to private.

cdietze OP
6 posts
 

Hmm... Sorry about that.  This afternoon was my first experience with Photobucket.  I'll try and straighten that out tomorrow. 

More to discover