The Amp Garage

Stevem wrote: ↑Thu Feb 08, 2024 10:57 am Are you ever actually going to play the amp like that, I would think not.

If you jump between the send and receive with a cable and there's no hum issue then call it good.

Probably i will not play like that, but i can't sleep if i don't resolve this

pdf64 wrote: ↑Thu Feb 08, 2024 9:27 am Have you checked for oscillation?

Is a 194HZ hum, i will try to use other tube position and rewire for fx loop ,that tube was for clean channel

I tried in one of my builds Merlin/Engl 12ax7 fx loop and i have loud hum only if i just plug guitar direct in return jack ,guitar volume at 0= zero hum ,from 1-9 loud hum ,on 10 hum is half loud. with delay,chorus,reverb in loop... no hum. I changed tubes,tried new cable,guitars,new loop jacks,sold...

WhopperPlate wrote: ↑Sat Dec 30, 2023 10:13 pm Does it sound as beautiful as it looks? Well done execution

For my style is perfect, but i play only metal

Raja_Kentut wrote: ↑Thu Dec 14, 2023 4:11 pm great craftsmanship!
You seem to be from Europe, like me, can you tell me the source for the elco holders ?

Tube-town.net

Lundahl are there only for weight saving :) and price increase :mrgreen: you can use torroids it is the same weight (light) and 5* cheaper (using magnetic flux of 1.5T like here (around) to have low number of turns and smaller core :wink: possible problem in using high saturation core like here /di...

it is very expensive build, free flow build i like that..with all the expensive parts from HiFi collective..IMO maybe no need to go this route, i discovered that some cheap parts works better (EJ parts :mrgreen: ) .. been there.. also i never liked exposed terminals on Lundahl , service guy can be ...

Very nice work! I'd love to see a schematic or just a description of the topology of each of your three channels. Is one of the channels a gain stage added? I'm kinda guessing based on the controls. Mike I don't have schematic, started from zero. 1-Clean channel ,2-drive channel-First stage paralle...

TUBEDUDE wrote: ↑Thu Dec 14, 2023 3:23 am Cause they're spendy AF.

Not really expensive(about 300eur per piece),in EU Mercury Magnetics cost 50% more.

Here is my new amp build : 100w 4xel34,6x12ax7, 3 channel, high end caps,C-core transformers and point to point wiring. Biggest challenge was this time to make PTP wiring in small chassis(470x195x60mm). I am still working on switching, but end result will be with headshell (Italian poplar) only 11.5...

Triptik is 4 stage plate driven
Triptik 2 is 4 stage+CF

I don't understand this part of power transformer current ratings, i always see on Hammond,Edcor and similar only like Center tapped 300-0-300V 0.200A or 0-300V 0.200 A but on Hashimoto Power transformers they label current in AC and DC like on photo. can someone explain this? Screenshot 2022-01-19 ...

here is video with no guitar and input cable

100 hz hum can only be coming from the sections of the amp that run on DC, so forget about anything that has to do with the filaments which run on 50 cycle. You stated you have replaced the filters in search of solving this issue, did you also replace or at least jump out the bias filter(s) ? Any p...

Amp is 3 stage gain 60w el34 fixed bias, with no guitar plug in, 100hz (tested with tuner)buzz/hum is very loud with volume up from 1 along with loud hiss,with volume to zero there is no hiss or buzz/hum,if i connect only first stage direct to tone stack buzz and hiss is low on max volume. I changed...