Search found 4644 matches

by Colossal
Tue Dec 19, 2023 12:14 am
Forum: Trainwreck Discussion
Topic: Edcor Transformers for Trainwreck Express
Replies: 6
Views: 5669

Re: Edcor Transformers for Trainwreck Express

The primary impedance for an Express OT is 6k6, not 7k5.
by Colossal
Sat Dec 16, 2023 12:45 pm
Forum: Marshall Discussion
Topic: 20W Silver Jubilee Build
Replies: 6
Views: 4677

Re: 20W Silver Jubilee Build

Looks great! That'll be a fun amp to play.
by Colossal
Fri Dec 15, 2023 1:06 pm
Forum: Garage Talk
Topic: New admin. New members!
Replies: 16
Views: 21881

Re: New admin. New members!

xtian wrote: Fri Dec 15, 2023 12:41 am Hey, friends, I'm on board as TAG admin. (Power corrupts!)

There was a big backlog of folks wanting to become members, and I've let many of them in just now, so I'll be watching out for shenanigans and spam.

Carry on, and happy holidays!
Excellent!
by Colossal
Wed Dec 13, 2023 12:30 pm
Forum: Technical Discussion
Topic: Primary impedance for OTs - output and tone
Replies: 16
Views: 6086

Re: Primary impedance for OTs - output and tone

FWIW, I ended up using the extra node for the screens but used a 10k dropper instead of 22k. That put the screen node at about 290vdc with 350vdc plates at idle. About 10.2vdc on the 120ohm cathode resistor. I’m now building a 15W Liverpool in a sister chassis using a custom Fender Deluxe OT that i...
by Colossal
Sat Dec 09, 2023 12:25 pm
Forum: Technical Discussion
Topic: Primary impedance for OTs - output and tone
Replies: 16
Views: 6086

Re: Primary impedance for OTs - output and tone

I recently built a 15W 2xEL84 Lightning clone using the alleged Matchless transformers built by Heyboer and sold on amppartsdirect. The 15W 2xEL84 OT has a primary impedance of 3800 ohms. Less than half of what most 2xEL84 amps are and about the same as their 30W amps (that OT is 3700 ohms). The am...
by Colossal
Sun Nov 26, 2023 8:43 pm
Forum: Trainwreck Discussion
Topic: Changed the Input Grid Stopper to 68K
Replies: 6
Views: 3804

Re: Changed the Input Grid Stopper to 68K

F70 for the win. Nice playing!
by Colossal
Sat Nov 25, 2023 12:57 pm
Forum: Trainwreck Discussion
Topic: Express / SLO 50W hybrid
Replies: 47
Views: 28360

Re: Express / SLO 50W hybrid

Very nice layout, Bepone.
by Colossal
Mon Nov 20, 2023 1:14 pm
Forum: For Sale/Trade
Topic: New PCBs! Dumblelator, Princeton Reverb, SLO100
Replies: 15
Views: 5601

Re: New PCBs! Dumblelator, Princeton Reverb, SLO100

Bump. Please monitor your thread for questions and activity. Thank you.
by Colossal
Mon Nov 20, 2023 1:08 pm
Forum: For Sale/Trade
Topic: WTB or WTT 50s era Astron caps
Replies: 12
Views: 3450

Re: WTB or WTT 50s era Astron caps

Bump up. Still looking?
by Colossal
Mon Nov 20, 2023 1:06 pm
Forum: For Sale/Trade
Topic: NOS Capacitors
Replies: 6
Views: 3811

Re: NOS Capacitors

Bump! Still available?
by Colossal
Mon Nov 20, 2023 1:05 pm
Forum: For Sale/Trade
Topic: WTB: dead Astron electrolytics
Replies: 15
Views: 3337

Re: WTB: dead Astron electrolytics

Bump. Still looking or did you find what you need?
by Colossal
Mon Nov 20, 2023 1:05 pm
Forum: For Sale/Trade
Topic: VOX AC30 Chassis on sale
Replies: 12
Views: 6799

Re: VOX AC30 Chassis on sale

Bump
by Colossal
Mon Nov 20, 2023 1:03 pm
Forum: For Sale/Trade
Topic: Trainwreck, Matchless and Marshall 18W PCBs
Replies: 3
Views: 2897

Re: Trainwreck, Matchless and Marshall 18W PCBs

Bump. Still selling?