Whats on your amp workbench?
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- Lyle
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Re: Whats on your amp workbench?
Had another go at the Jansen today. The circuit doesn't match up 100% with the schematics I've found online, but it does match photos I've seen of amp from the same time so I guess they changed it a bit over the years.
Waiting for some parts to arrive, I think some of the coupling capacitors are leaking which is causing the weird voltages I'm seeing.
Waiting for some parts to arrive, I think some of the coupling capacitors are leaking which is causing the weird voltages I'm seeing.
- RectifiedAmps
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Re: Whats on your amp workbench?
What kind of voltages are you seeing, and where?Lyle wrote: ↑Sun Apr 17, 2022 4:55 pm Had another go at the Jansen today. The circuit doesn't match up 100% with the schematics I've found online, but it does match photos I've seen of amp from the same time so I guess they changed it a bit over the years.
Waiting for some parts to arrive, I think some of the coupling capacitors are leaking which is causing the weird voltages I'm seeing.
- Lyle
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Re: Whats on your amp workbench?
B+ is high and then everything else after that. Plate voltage sitting at 600v. I checked the bias and it's sitting at 130% plate dissipation.RectifiedAmps wrote: ↑Mon Apr 18, 2022 8:45 amWhat kind of voltages are you seeing, and where?Lyle wrote: ↑Sun Apr 17, 2022 4:55 pm Had another go at the Jansen today. The circuit doesn't match up 100% with the schematics I've found online, but it does match photos I've seen of amp from the same time so I guess they changed it a bit over the years.
Waiting for some parts to arrive, I think some of the coupling capacitors are leaking which is causing the weird voltages I'm seeing.
I've still got more stuff to tidy up and I think one of the power tubes might be on the way out.
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- Ashton
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Re: Whats on your amp workbench?
Got a few more old projector cabs from the 50-60s. I've put 5c1 ish things in them in the past. I might try and squeeze a 5e3 into one. Or something earlier from here:
Last edited by PaulWD on Sat Aug 13, 2022 1:04 pm, edited 1 time in total.
- MikeC
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Re: Whats on your amp workbench?
Looks like you are gonna be very busy soon!
Whakanuia o mea kei a koe
- jeremyb
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Re: Whats on your amp workbench?
If you're needing an 8" 8 ohm speaker I have the HH one out of my laney cub I'd part with for cheap
Slowy wrote: That's the problem; everything rewarding is just such hard work. Regret takes much less effort.
- robthemac
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Re: Whats on your amp workbench?
[does math on how much JB has spent on this Laney compared to a higher-spec amp, green numbers cascade down field of vision]
- jeremyb
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Re: Whats on your amp workbench?
Its not that bad to be honest, the whole thing owes me $700 max... not bad for a jensen speakered champ!
Slowy wrote: That's the problem; everything rewarding is just such hard work. Regret takes much less effort.
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Re: Whats on your amp workbench?
Is the stereo setup working well?jeremyb wrote: ↑Thu Apr 21, 2022 2:05 pmIts not that bad to be honest, the whole thing owes me $700 max... not bad for a jensen speakered champ!
- jeremyb
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Re: Whats on your amp workbench?
I probably need to test the amps further away from each other to get some stereo separation but it’s super cool running the pair at once!
Slowy wrote: That's the problem; everything rewarding is just such hard work. Regret takes much less effort.
- clubhouse
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Re: Whats on your amp workbench?
Wow ...nice brood...clutch...raft...whatever the collective noun is. And thanks for the website tip...I've some m'self and want to do something similar in time. Any chance you could post what you've done already and updates on stuff to come?PaulWD wrote: ↑Thu Apr 21, 2022 12:49 pm 16505019603553379857608535764100.jpg
Got a few more old projector cabs from the 50-60s. I've put 5c1 ish things in them in the past. I might try and squeeze a 5e3 into one. Or something earlier from here: http://prewaramps.org/
- jeremyb
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Re: Whats on your amp workbench?
Update on the Laney Cub 8 Super, with the speaker and tube swap I'm absolutely loving it with my strat for JM-esque tones, sounds awseome with the ODR-1 on and the volume down on the guitar, delicious.
As far as with dirt pedals and the strat the rams head muff I have sounds epic with it, not really digging my other ODs with it apart from the ODR-1, but with humbuckers they're all sounding great!
As far as with dirt pedals and the strat the rams head muff I have sounds epic with it, not really digging my other ODs with it apart from the ODR-1, but with humbuckers they're all sounding great!
Slowy wrote: That's the problem; everything rewarding is just such hard work. Regret takes much less effort.
- JHorner
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Re: Whats on your amp workbench?
I can't find a schematic, but I believe they are all useless broken cunts.