Whats on your amp workbench?

Amp tinkerers and people who aren't afraid of 700 volts or so in here....

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Re: Whats on your amp workbench?

Post by RectifiedAmps »

Here’s something Ive never seen before: the plates on these old 6L6GCs must’ve seen a pretty impressive meltdown at some point, to be so warped and charred!:
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Re: Whats on your amp workbench?

Post by GrantB »

And now onto the 62 RI Strat. Taller frets and clay dots.
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Re: Whats on your amp workbench?

Post by sizzlingbadger »

None of my amps need frets.
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Re: Whats on your amp workbench?

Post by Slowy »

I fret about some of my amps.
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Re: Whats on your amp workbench?

Post by GrantB »

sizzlingbadger wrote: Sun May 26, 2024 2:54 pm None of my amps need frets.
Oh yeah, wrong thread LOL
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Re: Whats on your amp workbench?

Post by ChAoZ »

Got given this ages ago, my mate was moving and didn't want to take a broken amp, when I cracked it open a resistor fell out so I bought another one of the same value and soldered it in WALA
Pots are a bit crackly and a few knobs have the dial missing, but pretty good for $1.70
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Re: Whats on your amp workbench?

Post by Bg »

Had Sunday lunch then a gossipy catch up with my project lead from my old company, CTO is appearing to be even more unhinged, which was nice.

Consequently only got an hour or so to do the tolex wrap.

I’d love crème vents like the head I did for Ben but can’t justify the costs yet.

Anyway, wrapped it is. Corners are silly easy when they’re going to be covered.
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So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Re: Whats on your amp workbench?

Post by robthemac »

Bg wrote: Sun May 26, 2024 6:10 pm Had Sunday lunch then a gossipy catch up with my project lead from my old company, CTO is appearing to be even more unhinged, which was nice.

Consequently only got an hour or so to do the tolex wrap.

I’d love crème vents like the head I did for Ben but can’t justify the costs yet.

Anyway, wrapped it is. Corners are silly easy when they’re going to be covered.

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Looks lovely.
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Re: Whats on your amp workbench?

Post by Bg »

I wish I had cream hardware. Will wait till I’m working again.
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Re: Whats on your amp workbench?

Post by Bg »

Found some unemployed time today to progress further

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So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Re: Whats on your amp workbench?

Post by WellyBlues »

very cool BG. I want to know what tunes you had blasting away while you were working!
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Re: Whats on your amp workbench?

Post by Bg »

Trial baffle fit, bit of work to do on the piping, but all fits so happy with that!
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So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Re: Whats on your amp workbench?

Post by Bg »

WellyBlues wrote: Wed May 29, 2024 4:46 pm very cool BG. I want to know what tunes you had blasting away while you were working!
Today I was listening to Terry Pratchetts Moving Pictures….

Tomorrow I’ll be hitting some Rory though :)

Or some greeny ;)
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Re: Whats on your amp workbench?

Post by Bg »

I think I’ll have saved a whole kg or two at the end of this. But it’s way better looking and I reckon tone is in the pine
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Re: Whats on your amp workbench?

Post by Aquila Rossa »

I had the JMP sitting on my lap while I was watching YouTube today. Multimeter testing all the passive components to see if anything is wonky. Tricky to do in circuit, because sometimes you get half the expected reading etc (e.g., grid stoppers in parallel).

I could not find anything apart from a little drift here and there. The old mustard coupling caps are letting a tiny bit if VDC through too, which is not ideal, but I'd have to test them out of circuit to be sure. One resistor reads 4.7K, but the schematic says 47K, but I think that might just be the multimeter setting.

Important stuff like the screen and plate resistors are all A okay and spot on. That's good. That old Erie filter cap seems okay too (I suspected it was kaput). Pots are all good too. Not sure about the EL34s though.

I am trying to track down the source of a bit of hiss in the treble channel, plus what sends the amp into oscillation when cranked and then the presence is turned up. It sounds great, but can be better.

I can't really be effed with playing needle in a haystack at my low skill level, so will let a professional give it a refresh (when I decide who to take it to -- I do not want to bother Clarry with it, so might try that guy down in New Lynn -- there's some bloke in Blockhouse Bay too who is supposed to be good with Plexi stuff, but I dunno his deets)).

Edit. Yes, I checked there was no juice in the can caps before getting in there with my probe.

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