Recent content by s-petersen

As well as expected, retiring in August. The XYZ IIRC ran a little different bias, a little different gain as well and as what you said, a re-pinned 5881, also a little taller? I have been into shortwave, jukeboxes, and repurposing some Wallboxes lately

Hi Tom, The Rowe 7868 is a popular 35 watt amp for sure, converted to 7591 they are easy to keep running. Thanks!

A few years ago I had a cabinet for that (I believe) I was wondering what the amp looked like.

I Had sold a lot of stuff on Ebay in 2012, and had no issues and received good money, but then the fees increased substantially and Piney Bowes started stealing tube equipment that were sent using the global shipping program, so I stopped using them. Soon I have to sell again as downsizing is in...

I know this is a very old thread, but did you ever get it going? Convert it? I just got one cheap, it needed a separate filament transformer to work, but it is working enough to get sound out. what I'm wondering is, if with just the 12AT7s and El84s are used,would there be enough gain as an...

Does it feel a little heavy for it's size?

I had a Pioneer SX-82 that also looked that bad, and I just saved the transformers from it, and sold off some parts to someone that needed them. The transformers are in a box for someday (I'm retiring this year)

Almost that simple, you would need an input capacitor,(.1) and a 100k resistor to ground from the input grid. you would also have to adjust the resistors in the voltage divider as there is less load on the power supply.

The amp bears a resemblance to a Motorola, maybe an SE version of this: https://community.klipsch.com/index.php?/topic/194255-pictures-of-your-tube-amplifiers/page/5/#comment-2535889

Overall the amp is pretty good, the series Photoflash caps were the downfall of the one I have, once the leakage became unbalanced the better cap would over volt and short, then the other would short as mine did. I built a cap board to replace the original caps, and still have not installed it yet.

I was lucky, I found it pretty quick. The site compressed the images, send me a PM with your e-mail,and I can send them directly uncompressed

I'll look for it it.

Not really a review, but at least some info https://audio-database.com/SANSUI/amp/au-alpha707dr-e.html

I was able to open the schematic, and it does seem to use an output transformer and inductor in the output circuit, the schematic looks close enough to your amp to use for repair.

I have not seen a circuit that used a choke with an output transformer, but the choke could be connected to b+ at the same point as the output transformer, to power the other part parts of the amp / preamp