WIP Amp build - Deliverance 60 made 2 channels
- Thread starter Asdrael
- Start date
Asdrael
Well-known member
Once it has a front plate with a proper paint job and logo. Everyone knows that where tones come from.bro.
when do we get to hear it?
Also I fixed the foot switch issue, it was just the voltage drop of the led that was causing issues with the relays. My bad for making it in series. LED-less foot switch for this one!
Fixing the loop (which is way too hot for pedals, making them clip and tone suck like mad) will require more work in form of a buffered loop drawing from B+. Easy to do and implement, I am just disappointed I completely overlooked this initially. Not high in the priority list right now.
Asdrael
Well-known member
It's done. I had some problems with the initial grid I wanted to use (paint flacking like hell) so I went for my usual "long holes". Also, for some reason, I always associate VHT/Fryette with the color green. So I went ahead and SHOT A LASER AT SOME PLASTIC
And then bolted it on the faceplate. Behold the finished product:
On the electronics side, I didn't change much beside adjusting the Bias again. I like it at around 60% on that one (so like 48-50mA). Sounds better. I am doing some tube rolling but so far it's a Sovtek 12ax7WB in V1, a Psvane 12ax7 'low noise selected' in V2, a regular Psvane 12ax7 in V3 and I am trying out a TAD selected 12ax7 in the PI.
So as a summary, I happy to say I managed to grab a hold of a very helpful person with the schematic and a layout suggestion, learned some Fusion to redo the schematic, change some stuff I wanted to change, made my first PCB, ordered a custom PT, assembled everything, and it works amazingly well (and I didn't die as a bonus). It's the VHT/Fryette sound for sure, and "my" implementation of the 2 channel option is for my use at least ideal. It's full, aggressive, extremly dynamic, dry, and has a very very fast response. I find the balance between low mids + bass and high mids + treble a bit hard to find, so I need to experiment more with the Gain I setting in relation to the rest of the TMB stack settings. The presence is also pretty powerful, however the Depth doesn't do much.
Mistakes I need to learn from: triple checking weird components footprints on a PCB (looking at your octal sockets, had to reorder PCBs for that mistake), triple checking pot "direction" wiring (had 2 pots wired the wrong way but that's easy enough to fix), and be a bit less optimistic when it comes to tolexing and grid finishing.
Now I got 4 sets of PCB to get rid of
And then bolted it on the faceplate. Behold the finished product:
On the electronics side, I didn't change much beside adjusting the Bias again. I like it at around 60% on that one (so like 48-50mA). Sounds better. I am doing some tube rolling but so far it's a Sovtek 12ax7WB in V1, a Psvane 12ax7 'low noise selected' in V2, a regular Psvane 12ax7 in V3 and I am trying out a TAD selected 12ax7 in the PI.
So as a summary, I happy to say I managed to grab a hold of a very helpful person with the schematic and a layout suggestion, learned some Fusion to redo the schematic, change some stuff I wanted to change, made my first PCB, ordered a custom PT, assembled everything, and it works amazingly well (and I didn't die as a bonus). It's the VHT/Fryette sound for sure, and "my" implementation of the 2 channel option is for my use at least ideal. It's full, aggressive, extremly dynamic, dry, and has a very very fast response. I find the balance between low mids + bass and high mids + treble a bit hard to find, so I need to experiment more with the Gain I setting in relation to the rest of the TMB stack settings. The presence is also pretty powerful, however the Depth doesn't do much.
Mistakes I need to learn from: triple checking weird components footprints on a PCB (looking at your octal sockets, had to reorder PCBs for that mistake), triple checking pot "direction" wiring (had 2 pots wired the wrong way but that's easy enough to fix), and be a bit less optimistic when it comes to tolexing and grid finishing.
Now I got 4 sets of PCB to get rid of
drgonzo1969
Well-known member
Hell Yeah! Congrats on finishing it all up! Looks killer! I love the green/white color combo.
Paradox916
Well-known member
if we can’t hear it did it really happen?bro.
when do we get to hear it?
Asdrael
Well-known member
Thanks guys!
I don’t have anything to record except my iPhone. Any tips on doing that properly?
Paradox916
Well-known member
I’m just giving you
, if you demo it or not it’s a very cool build, but as a high gain junky I would love to hear it even if it was only a cell phone vid, I’m sure there are clever ways to to DI to your phone but I’m not the guy to ask on that one, I barely know how to use reaper as it is.
Asdrael
Well-known member
I’m just giving you
A bit bassy/boxy but fairly accurate I guess?
Signal chain: 6 string home made tuned to DADGAD half a step down. Gorilla Pickups - Discoverer pickup set -> Amp -> VHT 1x12 P100E -> iPhone voice memo bitch put on a stool so it faces the speaker more or less at the right spot.
Uninspired clean: first half using parallel humbucker neck, second half using series bridge humbucker.
High gain: a riff from Monuments on the bridge humbucker (series), towards the end some mindless around the fretboard jumping on the neck humbucker to showcase how bad I play.
drgonzo1969
Well-known member
Ooooof that things got some punch 
. Sounds killer! Nicely done sir.
. Sounds killer! Nicely done sir.
Paradox916
Well-known member
That’s what I’m talking about! Love the growl and bark it has. And for the gain on tap I expected a much higher noise floor. Well done sir!
drgonzo1969
Well-known member
Would you go with Psvane KT88's if you were to do it again? I am building a KT88 amp as well and might grab some tubes from Antique Electronic Supply while the have 10% off.
Guardians of the analog
Papi Fuego
This turned out really great and sounds killer, great job
Asdrael
Well-known member
TBH, not sure. While everything sounds fine, and they were well matched at the start, they drifted a bit and settled apart in bias (40mA one side, 48mA on the other. They share the same bias pot). I am not thrilled about that. Seems factory burn in is waaayy too short.
With current production KT88 however it is always a gamble. Pay attention to the plate current your pair is matched at… there are rumours that they currently go from 10 to 130 mA and no regular bias circuit can cope with that.
drgonzo1969
Well-known member
I'm leaning towards JJ's because that's what I've always used in my other amps. But I am a sucker for cool logos and those Genelex Gold Lions look cool as hell. Electro Harmonix KT88s look good too.... then there are the blue bottle ones.... too many choices hahaha.
JohnnyCreepy
Well-known member
Last summer when I was deciding between 6C7A, KT66, EL34II, EL34S and EL34, I gave a call for my not-so-local music related electronics store. I had a nice talk about tubes and the intended use with stores amp tech guy. He recommended to stay within JJ for more predictable reliability and to go with basic JJ EL34. He told that he had changed and sold quite a hefty amount of these tubes during past years and hadn’t recieved bad ones back.
Trying not to dive too much politics here, but the thing I like with JJ is, it’s one and only european manufacturer currently around. Maybe I have biased view about next statement, but guess it can be stated that by choosing it you support less or more western standards in manufacturing and occupational wellbeing.
Then there’s the hardest one to digest; changing output tubes affect how the amp sounds LESS than speakers and cabinet structure used.
So maybe wise thing to do is choosing the cheapest and most reliable tube, looking into dropping B+ voltage for extended tube life and trying to avoid GAS pushed by the industry soaked with snake oils…
Asdrael
Well-known member
PMing
Also small update I guess. This amp aged like fine wine. I played a bit with the preamp tubes, and I guess I broke it in well but holy fuck it became even nastier. The trick for me was to use a JJ EC83S in v1, a sovtek in V2, then Psvane for the rest. And keep the mids in check (4/10).
Boom instant palm mutes gut punch with clarity and grit. Turn this on, pop a smile.
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Ahh good choice on the Wima caps. I have FKP1, MKP10 and MKP4s here. I've also got Vishay axials in the turret board JCM.
How much space do you have under those large power resistors?
owlexifry
Well-known member
that crunchHigh gain: a riff from Monuments on the bridge humbucker (series), towards the end some mindless around the fretboard jumping on the neck humbucker to showcase how bad I play.
