Recent content by JonnyB

Good condition - racked in SKB 2U rack. Pictures on eBay (UK) Note - These amps have a reputation for hum which was bothersome when I initially got it. I therefore had it modified to re-route the signal chain within the unit. As a result, it no longer hums and is much quieter than stock. The...

Thanks JKD - in a further twist, I replaced the screen grid resistor, however on powering up, I discovered that although there was B+ voltage on the plate, there was 0v on the hot side of the O/P trasformer primary. On looking at the circuit I figured it was a burned out trace between the plate...

Never mind - I found the problem. As I suspected, the dying EL34 took out it's screen grid resistor which is now OC. I've ordered up another and hopefully that will fix the issue. Cheers!

Hi, I loaned out my RM50 to a buddy and he managed to break it. There is a very quiet distorted sound present when turning the master up whilst playing and one of the tube lights was on. When I got it on the bench I discovered one of the fuses was blown so I changed it along with both output...

My RM4 has developed a fault. Does anyone have a set of schematics they could let me have please? I'd be very grateful. Cheers!

Thanks for the info JKD. Unfortunately I've run into a snag. I had a plan to build my GSP1101 into the back of the head (it will fit in an RM 50 head) but it turns out the Mod 50 has a slightly less tall case than the RM 50 and the clearance is not enough. I'd just assumed they would be the...

Hi Guys, I'm about to pull the trigger on a Mod50 being sold by Franne500. He was listing it with 3 modules - V/X, SL2 and EG3/4. I can't afford 1500 euro's for all three modules though so he has agreed to sell with two. I was going to go for the V/X and SL2 as being the most versatile over the...

I'm selling my Randall RM100LB complete with matching cab. Both are in great condition and the head is signed by George. I'm including the following modules with the sale: Recto, Brown and The Judge. Also comes with footswitch and custom speaker cover. Looking for £1100 - no trades please as I...

I might be interested but could only go to 1250 euro's.

Hi Guys, I've finally managed to get some stuff recorded in the studio as LedZep/DC take a bit of a hiatus. This is a full cover of Led Zep's Heartbreaker recorded using a Les Paul JPP CA #1 straight into a Jaded Faith 1959RR parked in channel 3 of an RM100. The speaker cab was a Cornford 4x12...

Hi Scott, No, It's just a short unterminated cable. As you probably know, you wouldn't normally plug a guitar into the input as it's at line level. I'm just puzzled as to why the hum gets worse when the input is shorted. I have the schematics and will try and trace the signal path back from the...

Hi I have finally got my RT2/50 but it has an issue with 50/60 Hz hum. It's nothing to do with cabling as it hums when no input jack is inserted and not mounted in a rack. The weird thing is if I pop a jack plug in the input, the hum goes away! I'm aware that this is making the input open...

Hi, Does anyone have (or know where to get) schematics for the RT2/50. I have a major hum issue and need to try and get to the bottom of it. Thanks :)

Bump, great cause and props to Matt 8)

I'm in - donation sent. Thanks to everyone who has helped me in my quest for ultimate tone! Jon.