Search found 219 matches

by Randy Magee
Mon Jun 29, 2020 11:43 am
Forum: Trainwreck Discussion
Topic: Recommended TW parts suppliers
Replies: 15
Views: 2320

Re: Recommended TW parts suppliers

rjguitars.net can probably get you fixed up. He's a member of this forum and a really good fellow...
by Randy Magee
Sun Apr 07, 2019 5:26 pm
Forum: Speakers and Cabinets
Topic: 2X12 cabinet wired for 4 and 16 ohm
Replies: 4
Views: 3315

2X12 cabinet wired for 4 and 16 ohm

I have 2 8 ohm speakers in a 2X12 cabinet and wish to wire it for both 4 and 16 ohm loads using a couple of Cliff jacks. Could someone with more knowledge than I look this diagram over and see if my thinking is correct?
4 and 16 ohm wiring.jpg
by Randy Magee
Sun Mar 11, 2018 10:56 am
Forum: Technical Discussion
Topic: Bogen Schematics
Replies: 4
Views: 1226

Re: Bogen Schematics

Check here: http://el34world.com/charts/Schematics/ ... matics.htm

It looks similar to the E30 schematic...
by Randy Magee
Mon Jul 17, 2017 2:55 pm
Forum: Trainwreck Discussion
Topic: Trainwreck express pots
Replies: 23
Views: 4047

Re: Trainwreck express pots

Since this is a Trainwreck buiild with faceplate I would get the Alpha or CTS built and sold by Mojotone they are 10% However, most importantly when building an amp with a faceplate the threaded shafts are 3/8" long so you can bolt them on. Burns pots sold by ApexJr are also 3/8" long threads but b...
by Randy Magee
Mon Jul 17, 2017 11:03 am
Forum: Trainwreck Discussion
Topic: Trainwreck express pots
Replies: 23
Views: 4047

Re: Trainwreck express pots

Mark wrote: Sun Jul 16, 2017 11:43 am Randy check your taper by measuring it at 50%. The 10% volume controls are good on a Trainwreck. Though I've had bad experiences with 10% pots for treble controls.
I know how to measure the pots... my question is what make of pot would be a 10% taper and where can I find them?
by Randy Magee
Sun Jul 16, 2017 10:28 am
Forum: Trainwreck Discussion
Topic: Trainwreck express pots
Replies: 23
Views: 4047

Re: Trainwreck express pots

Where can a 10% taper pot be had? Most suppliers don't specify the taper. The volume pot on my express is almost like an ON/OFF switch...
by Randy Magee
Sun Jul 16, 2017 10:23 am
Forum: Fender Discussion
Topic: Static in reverb channel of '74 Deluxe Reverb
Replies: 5
Views: 912

Re: Static in reverb channel of '74 Deluxe Reverb

I ended up replacing the board with a black G10 garolite board and the issue is resolved and should never reappear...
by Randy Magee
Mon Jul 10, 2017 10:44 pm
Forum: Fender Discussion
Topic: Static in reverb channel of '74 Deluxe Reverb
Replies: 5
Views: 912

Static in reverb channel of '74 Deluxe Reverb

I have a weird static in the reverb channel of a '74 Deluxe Reverb that I can't seem to track down. Someone else worked on this amp before it came to me and left off the cathode bypass cap for the reverb driver tube. I replaced that cap as well as the 2.2K resistor associated with it, but that didn'...
by Randy Magee
Wed Apr 26, 2017 5:23 pm
Forum: Trainwreck Discussion
Topic: Fender Express Creation
Replies: 10
Views: 1550

Re: Fender Express Creation

The flyback diodes in my Express build caused an edgy, fizzy distortion to the overdriven tone. I ended up removing them and all was well.
by Randy Magee
Fri Apr 01, 2016 12:13 pm
Forum: Trainwreck Discussion
Topic: TW Rocket combo build
Replies: 12
Views: 3433

Re: TW Rocket combo build

How will the chassis be oriented? Will the tubes hang down?
by Randy Magee
Sun Nov 15, 2015 12:24 pm
Forum: Marshall Discussion
Topic: Cliff PC Jack problem
Replies: 5
Views: 1703

Re: Cliff PC Jack problem

You're right about flying the leads... there is not room for a cliff jack unless it's a PC jack that I can't source... I could get them from the UK, but I'd have to buy 1000 to get 1 and I don't figure this problem will come up 999 more times. I used a Switchcraft with insulating washers and it work...
by Randy Magee
Thu Nov 12, 2015 9:40 pm
Forum: Marshall Discussion
Topic: Cliff PC Jack problem
Replies: 5
Views: 1703

Re: Cliff PC Jack problem

I think I'm just going to put a Switchcraft in there and be done with it...
by Randy Magee
Thu Nov 12, 2015 1:40 pm
Forum: Marshall Discussion
Topic: Cliff PC Jack problem
Replies: 5
Views: 1703

Cliff PC Jack problem

I have a single input JCM 800 Lead amp on the bench with a bad input jack. I can't seem to find a source for the Cliff jack that is used on this PC board. The pins that connect to the circuit board on any replacements that I can find are the reverse on the original. In the image below the original i...
by Randy Magee
Mon Nov 02, 2015 12:57 pm
Forum: Dumble Files
Topic: Tweedle Dee Deluxe and Tweedle Dee Champ
Replies: 22
Views: 106516

Re: Tweedle Dee Deluxe and Tweedle Dee Champ

In the Tweedle Dee Champ layout the cathode for the power tube doesn't show a ground... am I missing something?
by Randy Magee
Thu Oct 29, 2015 4:39 pm
Forum: Trainwreck Discussion
Topic: diode string protection express mod
Replies: 12
Views: 4179

Re: diode string protection express mod

rooster,

I had the same problem with my Express... I ended up removing the diodes as well...