Search found 212 matches

by paulruby
Tue Aug 18, 2009 6:37 pm
Forum: Trainwreck Discussion
Topic: New express build works, but volume pot doesnt
Replies: 9
Views: 2091

Re: New express build works, but volume pot doesnt

I can't find the wire from the volume pot wiper to the next gain stage. Hard to see...

EDIT: I see it now...
by paulruby
Tue Aug 18, 2009 3:48 pm
Forum: Trainwreck Discussion
Topic: New express build works, but volume pot doesnt
Replies: 9
Views: 2091

Re: New express build works, but volume pot doesnt

Is the circuit ground connected to the volume/tone pots?
by paulruby
Sun Jun 14, 2009 1:29 am
Forum: Trainwreck Discussion
Topic: How hot does your 1k 25 watt resistor get?
Replies: 12
Views: 2549

Re: How hot does your 1k 25 watt resistor get?

Why not get a few turrests? Or, at least... Get some #4 brass bolts and nuts, maybe 3/8" long to use as turrets. Put the bolts up through from the bottom, nut from the top and use the threaded part that comes through to wrap leads around. The brass will solder nicely. Or a few brass eyelets from a f...
by paulruby
Mon Aug 18, 2008 6:07 pm
Forum: Trainwreck Discussion
Topic: Interesting interaction : OT primaries and heater wires
Replies: 9
Views: 1998

Re: Interesting interaction : OT primaries and heater wires

What circuit exactly is used to create the 25V DC?
by paulruby
Mon Aug 18, 2008 4:37 pm
Forum: Trainwreck Discussion
Topic: Interesting interaction : OT primaries and heater wires
Replies: 9
Views: 1998

Re: Interesting interaction : OT primaries and heater wires

Is your filament winding ground-referenced by a low-resistance pot? What is the resistance of your hum-balance pot? The only way I can see this being an issue is if the filament winding is weakly ground referenced such that the OT primary lines can yank the whole winding up and down. In other words,...
by paulruby
Wed Aug 13, 2008 11:02 pm
Forum: Trainwreck Discussion
Topic: Trainwreck transformers specs
Replies: 21
Views: 11452

Re: Trainwreck transformers specs

You could try asking heyboer. They're pretty open about stuff. Just ask them core size, wire size and number of turns. They might not want to tell you the interleave, but you can ask. The worst that can happen is they don't respond...
by paulruby
Wed Aug 13, 2008 10:49 pm
Forum: Trainwreck Discussion
Topic: Who can supply me a head cab ?
Replies: 10
Views: 2553

Re: Who can supply me a head cab ?

Michael Gaines. You'll need to give him the exact dimensions needed and ask him to hunt down the wood.

gaines _AT_ megapipe _DOT_ net
by paulruby
Fri Mar 07, 2008 5:01 pm
Forum: Technical Discussion
Topic: PT wiring question (SOLVED!!)
Replies: 2
Views: 836

Re: PT wiring question (SOLVED!!)

Very likely tie the white-stripe to the black then use the black-stripe and white as the 24VAC inputs. That would be the only logical choice given this color scheme.
by paulruby
Mon Mar 03, 2008 7:12 pm
Forum: Trainwreck Discussion
Topic: Center Tap Stand-by for a 'Pool
Replies: 1
Views: 773

Re: Center Tap Stand-by for a 'Pool

Works fine...
by paulruby
Fri Feb 22, 2008 11:31 pm
Forum: Trainwreck Discussion
Topic: Transformer Questions
Replies: 24
Views: 4261

Re: Transformer Questions

Why not use the standard iron from toneslut. I have some extras, too.

- Paul
by paulruby
Mon Jan 28, 2008 7:14 pm
Forum: Trainwreck Discussion
Topic: Need schooling on the fix that corrected my issue
Replies: 4
Views: 1102

Re: Need schooling on the fix that corrected my issue

So... Why is there 2 ohms between the PI ground point and other ground points? Something is fishy (still needing fixed).
by paulruby
Mon Jan 14, 2008 7:23 pm
Forum: Trainwreck Discussion
Topic: Express Input Jack Grounding
Replies: 6
Views: 1627

Re: Express Input Jack Grounding

I'm not a fan of this grounding scheme. Washers and nuts can loosen over time, get dirty then you have a bad ground. I once sent an amp across the USA, New Jersey to Califirnia. When it got there is had a nasty buzz. I had to have the customer return it at my expense. When it got here the footswitc...
by paulruby
Fri Jan 11, 2008 8:34 pm
Forum: Trainwreck Discussion
Topic: New to the board---and I have a few questions!
Replies: 4
Views: 1196

Re: New to the board---and I have a few questions!

8x17x3 will work great. I use 18ga stranded teflon wire but use what ever you like. It's your amp. Teflon won't melt or burn so is far easier to use. IMHO. This is a very gigable amp but is loud. Use whatever attenuation you think you need.... I would build the amp first and then figure that out. I ...