Hi team,
I have a K502 with a quad of 11BM8 tubes (similar to the thread kcroy created here https://www.diyaudio.com/community/...unsure-what-tubes-to-use.290013/#post-4684440 but the B version of it). Bought from Antique Electronic Supply in 2008
While moving I managed to loose the schematic that was supplied with the kit when I bought it so wondering if somebody has the same kit as myself and has a copy of the schematic to spare.
I have found the schematics of other kits (3 links below) and as I see the differences are minor to negligible but would be great if I could have the original to be able to compare 🙂
Small project behind this amp is:
I have a K502 with a quad of 11BM8 tubes (similar to the thread kcroy created here https://www.diyaudio.com/community/...unsure-what-tubes-to-use.290013/#post-4684440 but the B version of it). Bought from Antique Electronic Supply in 2008
While moving I managed to loose the schematic that was supplied with the kit when I bought it so wondering if somebody has the same kit as myself and has a copy of the schematic to spare.
I have found the schematics of other kits (3 links below) and as I see the differences are minor to negligible but would be great if I could have the original to be able to compare 🙂
- https://diyaudioprojects.com/Gallery/displayimage.php?pid=99
- https://diyaudioprojects.com/Gallery/displayimage.php?pid=123
- https://diyaudioprojects.com/Gallery/displayimage.php?pid=368
Small project behind this amp is:
- Do some major cleanup + new case
- Replace the power transformer since now it's 110V and I want to be able to plug it straight into 220V (dual output 11v ac for filaments + I presume somewhere between 165V and 200V for B+ but need to measure)
- Replace the output transformers
- Introduce a bias circuit on the tubes
Attachments
