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Re: Another old friend...
Posted: Tue Apr 23, 2024 2:24 pm
by BoringPostcards
I had that exact same amp in the same so-called limited edition colourway. It was a good amp, but I moved it on after a few years for no real reason.
Re: Another old friend...
Posted: Tue Apr 23, 2024 3:20 pm
by MattK
JSett wrote: ↑Tue Apr 23, 2024 10:15 am
I don't have access to any of that sort of software unfortunately. I'll have a look around though at possible sources. I only ask as you probably still have the correct file saved with all the dimensions.
If you send me a sketch with dimensional specs I'd be happy to knock it out in Illustrator for you.
Re: Another old friend...
Posted: Tue Apr 23, 2024 8:48 pm
by JSett
BoringPostcards wrote: ↑Tue Apr 23, 2024 2:24 pm
I had that exact same amp in the same so-called limited edition colourway. It was a good amp, but I moved it on after a few years for no real reason.
I honestly really rate the HRD amps. They were the defacto pedal platform 15+ years ago and were backline in almost every venue if provided. They have their (sometimes) major issues but a lot out there have already had the work done.
MattK wrote: ↑Tue Apr 23, 2024 3:20 pm
If you send me a sketch with dimensional specs I'd be happy to knock it out in Illustrator for you.
This would be fantastic! Thank you
Re: Another old friend...
Posted: Wed Apr 24, 2024 3:55 am
by JSett
Dr Tony Balls wrote: ↑Tue Apr 23, 2024 6:12 am
For the preamp tubes I wasnt able to find a good fit so I used some of
these adapters and was able to get by. One could probably make their own too.
I'm just pricing this all up. Angela want £36 to ship 3 of those adapters
can't find any alternatives either.
So far, with going with F&T/Sprague caps, vishay resistors, switchcraft jacks etc, turret board, sockets etc it's looking at about £250 in parts to do the conversion.
Re: Another old friend...
Posted: Wed Apr 24, 2024 4:52 am
by F15hface
This thread has reminded me that an acquaintance has a blues jr ‘woody’ that’s broken which I’d love to put a tweed Princeton in.
Or a 6G2, but the internet has lead me to believe that’s a lot harder.
Re: Another old friend...
Posted: Wed Apr 24, 2024 6:06 am
by JSett
So I ordered a load/all the parts I'm likely to need. Just waiting on Tonys kind offer of a layout for the conversion (no rush).
I think I've managed to get it all for £220 (thanks MattK for finding some cheaper 9 pin adaptors). That's for everything except wire, which I already have tons of.
The only thing I'm ignoring for now is a faceplate.
Re: Another old friend...
Posted: Wed Apr 24, 2024 6:08 am
by Dr Tony Balls
MattK wrote: ↑Tue Apr 23, 2024 3:20 pm
JSett wrote: ↑Tue Apr 23, 2024 10:15 am
I don't have access to any of that sort of software unfortunately. I'll have a look around though at possible sources. I only ask as you probably still have the correct file saved with all the dimensions.
If you send me a sketch with dimensional specs I'd be happy to knock it out in Illustrator for you.
I have the file I used on mine which ought to be about the same, save for a different sized lamp hole.
Re: Another old friend...
Posted: Wed Apr 24, 2024 6:12 am
by Dr Tony Balls
JSett wrote: ↑Wed Apr 24, 2024 3:55 am
I'm just pricing this all up. Angela want £36 to ship 3 of those adapters
can't find any alternatives either.
Two alternatives: 1) I order them and send em t you for much less than 36 quid. 2) make something that does the trick.
Did you order a bias pot? If so which value and type?
Re: Another old friend...
Posted: Wed Apr 24, 2024 6:22 am
by JSett
Dr Tony Balls wrote: ↑Wed Apr 24, 2024 6:12 am
JSett wrote: ↑Wed Apr 24, 2024 3:55 am
I'm just pricing this all up. Angela want £36 to ship 3 of those adapters
can't find any alternatives either.
Two alternatives: 1) I order them and send em t you for much less than 36 quid. 2) make something that does the trick.
Did you order a bias pot? If so which value and type?
MattK found some very similar ones on eBay from China for £11 for 4. Free postage (gonna be 3 weeks though, not that I'm in a hurry)
I did order a bias pot, I went with one of the 10k Linear CTS ones, seeing as it's a Fender circuit...
The filter caps I went with F&T in 47uF & 22uF flavours seeing as they don't do 40uF and 20uF exactly. Everything else was pretty much the right values. I've bound to have forgotten something though
Re: Another old friend...
Posted: Wed Apr 24, 2024 6:42 am
by Dr Tony Balls
Oh word, those look like they'll work just fine!
Cool, I wasnt sure if you were trying to do chassis mount or board mount on the bias pot. Also FWIW I find that unless i'm building the same amp twice I always have to adjust components in bias circuits to get a proper range of bias voltages. I'll set it up as it would be in a HRD but you may have to do some resistor swapping to get things to your liking.
What turret board did you get? Just wanna know the grid spacing for a layout.
Re: Another old friend...
Posted: Wed Apr 24, 2024 6:52 am
by JSett
Dr Tony Balls wrote: ↑Wed Apr 24, 2024 6:42 am
Oh word, those look like they'll work just fine!
I'm going to drill a hole nearby to the bias part of the circuit and mount it like they did in the BF amps. Seemed logical to my brain seeing as it only has 1 fly lead and a ground connection via a 15k resistor.
Cool, I wasnt sure if you were trying to do chassis mount or board mount on the bias pot. Also FWIW I find that unless i'm building the same amp twice I always have to adjust components in bias circuits to get a proper range of bias voltages. I'll set it up as it would be in a HRD but you may have to do some resistor swapping to get things to your liking.
What turret board did you get? Just wanna know the grid spacing for a layout.
Yeah, I assumed some values might change when setting it up. I ordered a 100ohm 10w for the 'choke' replacement but I have others here already in similar sizes I can change out when it comes to it (the 100ohm was a guess based on other schematics out there)
The best turret board I found was a DR103 style one
At 45mm x 298mm x 3mm the biggest cap will be a squeeze but everything else should fit fine. Looking at your layout earlier, and allowing for a few caps at the end, I think the 30 rows will be enough. As long as the layout is right-to-left, my brain should be able to make any adaptations needed pretty easily
Re: Another old friend...
Posted: Wed Apr 24, 2024 7:05 am
by Dr Tony Balls
JSett wrote: ↑Wed Apr 24, 2024 6:52 am
The best turret board I found was a DR103 style one
You have a link to the supplier?
Re: Another old friend...
Posted: Wed Apr 24, 2024 7:08 am
by JSett
Dr Tony Balls wrote: ↑Wed Apr 24, 2024 7:05 am
You have a link to the supplier?
There's not exactly a
wealth of information on it but options here in the UK seem limited.
I'm guessing there's about a 30mm gap between each row, which will mean there's some fancy leg bending going to happen with the filter caps
Re: Another old friend...
Posted: Wed Apr 24, 2024 7:13 am
by JSett
Dr Tony Balls wrote: ↑Wed Apr 24, 2024 7:05 am
You have a link to the supplier?
I could order one of these instead if you think the space will be better?...
One from China
Re: Another old friend...
Posted: Wed Apr 24, 2024 7:25 am
by Dr Tony Balls
Hard to say. Those F&Ts are 38mm long, and the board you bought is 45 with the turrets set in a bit....it'll be a tight fit for sure but you may be able to elevate the caps above the turrets if there's not enough clearance.