Search found 895 matches

by Guy77
Mon Mar 25, 2024 9:28 pm
Forum: Dumble Discussion
Topic: New Project
Replies: 26
Views: 676

Re: New Project

No problem, it's all good input! Sounds good, too. Interesting you had success with a 6L6, what with its need for more drive voltage than an EL84 or 6V6. Thanks Martin, its my friend Kyle playing the amp. I would like to turn back the clock to being that young again LOL. I was thinking the same thi...
by Guy77
Mon Mar 25, 2024 8:04 pm
Forum: Dumble Discussion
Topic: New Project
Replies: 26
Views: 676

Re: New Project

Excellent! I had forgotten all about that. I have the schematic Colossal drew up, which has some good ideas. Matt drives an EL84 directly, where I'm planning on a 6V6. I want to ditch the preamp out/power amp in, and take a line out from the output transformer. That will be driving either a resisti...
by Guy77
Fri Mar 15, 2024 7:24 pm
Forum: Technical Discussion
Topic: Lowering B+ on Single ended amp with Choke input
Replies: 9
Views: 247

Re: Lowering B+ on Single ended amp with Choke input

Thanks everyone for all the great info here on this subject. I have grown very found of Single Ended amps lately and have built several ODS style circuits in single ended format, both high plate and low plate and really enjoyed the sound. I was pleasantly surprised! Its interesting how less seems to...
by Guy77
Fri Mar 15, 2024 3:23 am
Forum: Technical Discussion
Topic: Lowering B+ on Single ended amp with Choke input
Replies: 9
Views: 247

Lowering B+ on Single ended amp with Choke input

I came across this interesting idea for lowering B+ on a Single Ended amp that has a choke input. It was used by a gentleman named Gordon Rankin in his Cardinal amps. I would use it for guitar amps. DropB.JPG He used a small input cap before a choke, you have to experiment to get the right voltage d...
by Guy77
Wed Mar 13, 2024 2:53 pm
Forum: Technical Discussion
Topic: 2024 Monkeymatic Liverpool (nontraditional)
Replies: 48
Views: 1209

Re: 2024 Monkeymatic Liverpool (nontraditional)

Last step required to manage gain was to replace both 12AX7s with 12AT7s. Very happy now. Playing thru an EVM12S. Amp can be way too bright—can't turn on bright switch, and Presence is too much. But tone stack controls are really responsive. This demo is recorded with: Treble 3, Mid 3, Bass 5. This...
by Guy77
Sun Mar 10, 2024 1:27 pm
Forum: Technical Discussion
Topic: 2024 Monkeymatic Liverpool (nontraditional)
Replies: 48
Views: 1209

Re: 2024 Monkeymatic Liverpool (nontraditional)

Great looking chassis Christian! I have been using the LND150 as the first stage in several of my amps and I did not need any extra Cap between the Input Jack and the LND150 to tame any noise. I have been using these LND150 jacks from Granger and they are quiet as a mouse. I order them with a 25K or...
by Guy77
Thu Mar 07, 2024 3:23 pm
Forum: Dumble Discussion
Topic: Dumble ODS #22
Replies: 15
Views: 551

Re: Dumble ODS #22

I agree this amp sounds fantastic. Regarding the presence pot and mid switch...maybe a similar arrangement to #093 but with the pot mounted externally rather than a trimmer on the board. srvdumbonetb2.jpg P.s. I am not sure why the filename for this picture, but afaik it has no connection to SRV. -...
by Guy77
Sun Mar 03, 2024 2:12 pm
Forum: Dumble Discussion
Topic: AN Wonderland/JM 100w layout
Replies: 266
Views: 92930

Re: AN Wonderland/JM 100w layout

Hi everyone, Starting my second build after a Marshall Plexi 18W that came great. I have a Twin Reverb 65 RI chasis with PT and Reverb Transformer. with a late 70's Ultralinear OT that I'm planning to use without the UL taps. The twin comes with an extra 12()7 tube. I was wondering if I should use ...
by Guy77
Mon Feb 26, 2024 10:31 pm
Forum: Dumble Files
Topic: Ultraphonix adventure
Replies: 200
Views: 165528

Re: Ultraphonix adventure

Sounds amazing Mark. Congrats!

Cheers
Guy
by Guy77
Mon Feb 19, 2024 5:16 pm
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1587

Re: New F&T 100uf 350v caps: Tip Of The Week

In an ac100, I tested the following F&Ts at the mains: - 100uf 550v axial (special series for Frag Jan zuerst): fast, explosive response, good harmonics - 2x 220uf 350v A series axial in series: slower, laxer. less aggressive and bold All caps were slow-formed (voltage dropped to 2v across 100k res...
by Guy77
Mon Feb 19, 2024 2:55 pm
Forum: Technical Discussion
Topic: Peak Boomer Nonsense incoming
Replies: 15
Views: 472

Re: Peak Boomer Nonsense incoming

This could actually be an Overdrive Special with the HRM controls on the front. Actually wait it has 4 preamp tubes so maybe something different. Its also running a Hammond 1760 series output transformer. The power transformer looks like a Hammond 372HX. I am judging this by the look of the height d...
by Guy77
Fri Feb 16, 2024 10:11 pm
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1587

Re: New F&T 100uf 350v caps: Tip Of The Week

I have used these 2 different series of Nichicon caps for 50 watt and 100 watt D-Style builds and they are noticeably tighter sounding than the F&T caps. If you enjoy the bouncy F&T these maybe too tight for you. I used these for the first 2 caps for the Power Supply. 2Rock is now also using these (...
by Guy77
Fri Feb 16, 2024 6:11 pm
Forum: Garage Talk
Topic: I bought a solid walnut apartment. Uh, speaker cabinet.
Replies: 27
Views: 921

Re: I bought a solid walnut apartment. Uh, speaker cabinet.

This cabinet came out nicely. Sounds great, with a Celestion G12H and Eminence Wheelhouse 150. IMG_2876.jpeg IMG_2877.jpeg Congrats Christian! Looks amazing in the room. I love mixing Eminence Hemp speakers with Celestion G12 speakers. I recently did a 2x12 with a Cannabis Rex and a Celestion G1265...
by Guy77
Tue Feb 13, 2024 3:27 pm
Forum: Dumble Files
Topic: Ultraphonix adventure
Replies: 200
Views: 165528

Re: Ultraphonix adventure

Looks and sounds Fantastic Fred. Congrats!

Guy

Cheers