New Amp Build

[Guitarxtc]

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 kg for full 100w head

[xtian]

Wow! That's full power OCD, and I salute you!

[alnight]

That is an impressive piece of work there sir. What do you think of those Jupiter caps? I have yet to try any of those, but I amp curious.

[Lauri]

Nice build. Lundahl transformers are a rare sight in guitar amps.

[TUBEDUDE]

Cause they're spendy AF.

[romberg]

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

[Guitarxtc]

Cause they're spendy AF.

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

[jabguit]

Cause they're spendy AF.

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

in the US Mercury cost 50%+ more

[Guitarxtc]

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 parallel-2-3-4-and cf, 3-channel-first parallel-2-3-4 plate driven and different tone stack

[bepone]

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 ) .. been there..

also i never liked exposed terminals on Lundahl , service guy can be electrocuted in a second..

interested to see the results/possible problems..

[Guitarxtc]

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 ) .. been there..

also i never liked exposed terminals on Lundahl , service guy can be electrocuted in a second..

interested to see the results/possible problems..

Lundahl are there only for weight saving

[bepone]

Lundahl are there only for weight saving

and price increase 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

possible problem in using high saturation core like here /discovered in the past / that attack on the note is very fast, so not good for some types of music..for metal is ok

[Guitarxtc]

Lundahl are there only for weight saving

and price increase 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

possible problem in using high saturation core like here /discovered in the past / that attack on the note is very fast, so not good for some types of music..for metal is ok

I will look into Toroidal, maybe try hybrid rectifier: tube and SS at the same time ?

Sad si mi dao zanimaciju

[TUBEDUDE]

Cause they're spendy AF.

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

in the US Mercury cost 50%+ more

Yeah, we have different definitions of expensive.

[maxkracht]

When I'm feeling fancy I spring for the 1000v Panasonics. Very nice looking build!