Asdrael
Well-known member
You guys might have seen my Rosamp Slo 30 kit build at the end of 2024. I really liked doing it, and I really like the end result.
But (there is always a but)... I still miss dearly my VHT Deliverance 60 that I had a while ago, before power soaks were common. Amp was massive, loud, but so freaking nice to play. If you are not aware, it's has two gain knobs per channel and a KT88 pair in the power section so fairly unique. I ended up selling it because, being a single channel and no loop amp, I felt it was too barebone for me. I then got a Sig:X for a while but that's another story.
I recently stumbled on a few sources that had reliable schematics and a very nice guy (headcrash if you read this... thanks so much again) from another forum was kind enough to send me some files for a Deliverance 60 he did with 2 masters. I jumped on the occasion, but wanted to make significant changes:
- an FX loop
- fully 2 channels, meaning the Less and More more will each have their Gain I and Gain II knob and volume, and be footswitch-able
- "big lunchbox" size. Goal was to have everything fit in a Hammond 1444-1783 (17"x8"x3").
So i went to work. The issue was that I know (knew?...ish) nothing about tube amp schematic, relays, and PCB designs. Queue quite a learning curve on Fusion (greatly facilitated by the aforementioned nice guy) and this is where I stood:
To turn it into a PCB, I inspired myself from his work but had to move stuff around to include the bigger and more numerous relays, as well as redesign how the preamp and power section were split.
I also -since I was at it- learned some very, very basic 3D modelling to see how stuff could fit.
Happy with this, I ordered everything. I went with WIMA/Würth capacitors (being based in germany, I kinda had to), Alpha pots, Vishay resistors etc. The output transformer is a Hammond, the Power supply is a custom toroidal (from the German company Müller-Rondo, was fairly cheap too and it seems really solid). So decent grade stuff that I hopefully won't blow up on the power up. I will also make the headshell for multiply as I did for the Slo, and the metal panels will be ordered once I get there to make sure I have the right size. PCB from JLCPCB.
I received everything except the tubes (will be some Psvane that I got on Aliexpress, wish me luck), and all was good but two disappointments:
- Hammond series 1444 chassis are thin. I didn't really realize how weak 1.2mm aluminum felt. I sent it back as I could bend it with one thumb. Got a custom chassis made which ended up being cheaper but is 3mm thick aluminum. Shit won't bend yo. It's actually not a chassis but a wall cap (I don't know how it's called in english). Kinda like a fancy gutter really. Dimensions are basically the same: 440x200x65 (internal).
- I fucked up the PCB slightly
everything is fine but for some reason I got the socket footprint wrong. The pins won't fit, the diameter is wrong, and the pads are thin as hell. I just corrected it and sent it back for production, also making some pads slightly larger (diodes and small resistors) so it's easier to build. They looked cool though.
So yeah V1.1 coming up soon. I checked every other spacing, etc and everything seems fine really.
I am now designing the faceplate (that I will laser engrave on a black/white multiply). Might move some stuff around but so far I like it.
I should get the new PCBs in a week or so and then start with the assembly and drilling the chassis. Exited to start building this!
But (there is always a but)... I still miss dearly my VHT Deliverance 60 that I had a while ago, before power soaks were common. Amp was massive, loud, but so freaking nice to play. If you are not aware, it's has two gain knobs per channel and a KT88 pair in the power section so fairly unique. I ended up selling it because, being a single channel and no loop amp, I felt it was too barebone for me. I then got a Sig:X for a while but that's another story.
I recently stumbled on a few sources that had reliable schematics and a very nice guy (headcrash if you read this... thanks so much again) from another forum was kind enough to send me some files for a Deliverance 60 he did with 2 masters. I jumped on the occasion, but wanted to make significant changes:
- an FX loop
- fully 2 channels, meaning the Less and More more will each have their Gain I and Gain II knob and volume, and be footswitch-able
- "big lunchbox" size. Goal was to have everything fit in a Hammond 1444-1783 (17"x8"x3").
So i went to work. The issue was that I know (knew?...ish) nothing about tube amp schematic, relays, and PCB designs. Queue quite a learning curve on Fusion (greatly facilitated by the aforementioned nice guy) and this is where I stood:
To turn it into a PCB, I inspired myself from his work but had to move stuff around to include the bigger and more numerous relays, as well as redesign how the preamp and power section were split.
I also -since I was at it- learned some very, very basic 3D modelling to see how stuff could fit.
Happy with this, I ordered everything. I went with WIMA/Würth capacitors (being based in germany, I kinda had to), Alpha pots, Vishay resistors etc. The output transformer is a Hammond, the Power supply is a custom toroidal (from the German company Müller-Rondo, was fairly cheap too and it seems really solid). So decent grade stuff that I hopefully won't blow up on the power up. I will also make the headshell for multiply as I did for the Slo, and the metal panels will be ordered once I get there to make sure I have the right size. PCB from JLCPCB.
I received everything except the tubes (will be some Psvane that I got on Aliexpress, wish me luck), and all was good but two disappointments:
- Hammond series 1444 chassis are thin. I didn't really realize how weak 1.2mm aluminum felt. I sent it back as I could bend it with one thumb. Got a custom chassis made which ended up being cheaper but is 3mm thick aluminum. Shit won't bend yo. It's actually not a chassis but a wall cap (I don't know how it's called in english). Kinda like a fancy gutter really. Dimensions are basically the same: 440x200x65 (internal).
- I fucked up the PCB slightly
everything is fine but for some reason I got the socket footprint wrong. The pins won't fit, the diameter is wrong, and the pads are thin as hell. I just corrected it and sent it back for production, also making some pads slightly larger (diodes and small resistors) so it's easier to build. They looked cool though.
So yeah V1.1 coming up soon. I checked every other spacing, etc and everything seems fine really.
I am now designing the faceplate (that I will laser engrave on a black/white multiply). Might move some stuff around but so far I like it.
I should get the new PCBs in a week or so and then start with the assembly and drilling the chassis. Exited to start building this!
