Finally got my GM70 amp all done............Sounds even better than my Parallel 300B amp. Very good base control. .
what brand of 300b used?
what brand of 300b used?
Only ever used Chinese 300B's. The last ones I used were the Full Music mesh plates.
Finally got my GM70 amp all done. Sounds just great! Could not be happier with how it turned out. Sounds even better than my Parallel 300B amp. Very good base control. It is driving into a JBL E140 in a 200 pound box tuned at 30 Hz.
The Hammond 167P18 (18v 5 amp) works perfectly for the filament supply. So perfect in fact it's 77% efficient with a linear regulator.
Where did you source that ammeter? It's a nice vintage look
Where did you source that ammeter? It's a nice vintage look
The ammeter is a Simpson 05690. Mouser can get them for you. Wow they are quite expensive now. Think they were ~$75.00 CND when I got them.
Also latest schematic here.
Attachments
Thanks, ordered them today at $90 (USD) each! I'm sure they are much better than the chinese versions on Ebay.....
I have some of the Chinese ones from ebay. They are orders of magnitude better. Enjoy!
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