Search found 93 matches

by CrunchBunch
Thu Dec 13, 2018 7:10 am
Forum: DIY
Topic: "The Cleaner" customised module
Replies: 15
Views: 8041

Bit of a blast from the past, but did Matt ever do a review of "The Cleaner". I'm still using the two original modules I built and still like them every time I play 'em.
by CrunchBunch
Thu Oct 12, 2017 6:20 am
Forum: Egnater / Randall Modular Amps
Topic: anyone know about trannies? in the RT2/50?
Replies: 18
Views: 5367

Re: anyone know about trannies? in the RT2/50?

Interesting nugget: Every RM80 I have ever seen were also Heyboer equipped. Very few were made and that's a stock upgrade over an RM50. How can you tell if they are Heyboer? My two RM80s have very little in the way of markings on the transformers. From memory the output has a sticker with OT-75 on ...
by CrunchBunch
Sun Aug 13, 2017 4:51 pm
Forum: Egnater / Randall Modular Amps
Topic: RM20 power amp mods
Replies: 10
Views: 3429

Thanks for pointing out the errors. All fixed now.
by CrunchBunch
Wed May 17, 2017 8:58 pm
Forum: Modules
Topic: 3 Tube Module?
Replies: 8
Views: 2180

Very cool.
by CrunchBunch
Sun Mar 05, 2017 3:55 pm
Forum: Modules
Topic: Your Favorite Module Tubes for your Higher Gain Modules
Replies: 15
Views: 4508

...Short of that, my goto has become the JJECC803S.... Interesting. They're great in my clean modules, but I've steered clear of them for high gain use because of the increased risk of microphonics. You haven't experienced any of that? I'll definitely give them a go in V1 on some high gain modules....
by CrunchBunch
Wed Feb 22, 2017 3:48 pm
Forum: Other Gear
Topic: Carvin Quad-x Preamp?
Replies: 1
Views: 2928

I've got one. It was my primary pre-amp before I got into the Randall MTS stuff. It's a "good" bit of gear but in stock form the sound falls a little short of being "great". Clean channel is OK but nothing special (yet to hear a Carvin clean channel that really does it for me). Channel 2 can get a l...
by CrunchBunch
Sun Jan 15, 2017 7:04 pm
Forum: Modules
Topic: RM22 Footswitch
Replies: 32
Views: 8720

This would suggest that the microcontroller programming on the RM22 version is different than the RM100 version.
by CrunchBunch
Thu Jan 12, 2017 7:21 pm
Forum: Egnater / Randall Modular Amps
Topic: RM20 Combo Boost Not Working
Replies: 7
Views: 2372

the boost function is SS.. V1 is not switched in or out... On what do you base this? See circuit diagram below of RM20 input stage showing how the second half of V1 is switched into the circuit when the boost function is engaged. The boost gain pot (not shown) acts as half of a voltage divider on V...
by CrunchBunch
Thu Jan 12, 2017 7:10 am
Forum: Egnater / Randall Modular Amps
Topic: RM20 Combo Boost Not Working
Replies: 7
Views: 2372

Did you try replacing V1?
by CrunchBunch
Wed Jan 11, 2017 9:59 pm
Forum: Egnater / Randall Modular Amps
Topic: RM20 Combo Boost Not Working
Replies: 7
Views: 2372

You may well have a bad valve in V1 or dirty pins/socket. Try another 12AX7 in there. V1 is the tube closest to the input socket.
by CrunchBunch
Wed Jan 11, 2017 3:49 pm
Forum: Egnater / Randall Modular Amps
Topic: RM20 Built-in Boost function
Replies: 11
Views: 3993

...The volume boost on the RM20 is later in the preamp... I don't think this is right. After looking at the schematic for the RM20, the boost function uses the second half of the first 12AX7 (V1) to provide a gain boost in the signal path after the first input stage (1st half of V1) but before the ...
by CrunchBunch
Sat Dec 31, 2016 9:14 am
Forum: Modules
Topic: Fave clean and why....
Replies: 13
Views: 2972

Well I really like The Cleaner (but I'm biased ☺).
by CrunchBunch
Wed Nov 30, 2016 8:54 pm
Forum: Egnater / Randall Modular Amps
Topic: RM20 power amp mods
Replies: 10
Views: 3429

I've added some pictures here that should help out - http://faqload.com/faqs/music/randall-r ... volume-mod
by CrunchBunch
Wed Nov 30, 2016 5:54 am
Forum: Egnater / Randall Modular Amps
Topic: RM20 power amp mods
Replies: 10
Views: 3429

RM20 power amp mods

Have done a few mods to my RM20 combos and heads that others may be interested in. Master volume mod: - lift the right side (looking from the front) of C9 from the board; - solder to pin 1 of an A1M pot (1M log / audio taper) pot; - solder an 0.1uF cap from pin 2 of the pot back to the vacant hole f...
by CrunchBunch
Tue Nov 22, 2016 9:25 pm
Forum: DIY
Topic: MIDI hack
Replies: 15
Views: 5883

What a great DIY project. Awesome stuff. Thanks so much for sharing this and documenting it so well.