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Post new topic Want to build a 25L15 Standel clone, schematic??
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Author Topic:  Want to build a 25L15 Standel clone, schematic??
Ken Fox


From:
Ray City, GA USA
Post Posted 6 May 2008 11:54 am     Reply with quote

Thanks for the links!!!
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Herb Steiner


From:
Briarcliff TX 78669
Post Posted 6 May 2008 7:45 pm     Reply with quote

Ken
I have an original 25L15 from '56, as well as an 80L15 from 1959, but I don't know how to schematicize these things. If you ever make it out to Austin TX, you can certainly take a close look and do your own browsing around the guts of these things.
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 6 May 2008 9:36 pm     Reply with quote

Ken, follow that Hoffman board Standell thread.

Better yet join the board and contribute.
You would be a valuble member there.

And few other SGF members are therte too.
Jim Mitchel and Bill Creller for examples.

And if you do nothing,
read EVERYTHING ' PRR ' writes,
this guy knows more about tube electronics
than anybody I have ever encountered.
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Real happiness has no strings attached.
But pedal steels have many!
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Ken Fox


From:
Ray City, GA USA
Post Posted 7 May 2008 5:06 am     Reply with quote

Wow, red the Hoffman thread lat night. That is a superb discussion and a great education on tube amp design as well.

Herb, next time I get remotely near you I would love to sit down and take a look and listen to that amp. I have never had the pleasure of playing through one. It must be a real treat!!
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 7 May 2008 10:57 am     Reply with quote

Search anything PRR has written in the last month.
The guy is encyclopedic on tube amps.

There are some really great amp desiging ideas
and discussions and trouble shooting on the fly.
And a very respectful bunch too.

Been spending a LOT of time there lately.
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DLD, Chili farmer. Plus bananas and papaya too.

Real happiness has no strings attached.
But pedal steels have many!
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Marc Jenkins


From:
Victoria, British Columbia, Canada
Post Posted 24 Mar 2009 8:49 pm     Reply with quote

Update:

Ted says that he may have the kit ready as soon as 3 weeks from now. So close!

Schematic here:
http://www.tedweber.com/schematics/807_schem.jpg
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 24 Mar 2009 8:55 pm     Reply with quote

Looks cool and one of the cleaner schematics that
I have seen pertaining to Standels.
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DLD, Chili farmer. Plus bananas and papaya too.

Real happiness has no strings attached.
But pedal steels have many!
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J Fletcher


From:
London,Ont,Canada
Post Posted 25 Mar 2009 4:25 am     Reply with quote

That schematic looks like a 60's Fender, with some small changes, and different output tubes. Is it supposed to be a Standel?
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Jussi Huhtakangas


From:
Helsinki, Finland
Post Posted 25 Mar 2009 4:46 am     Reply with quote

The original 25L15 was largely based on the Williamson hifi amp and sounded nothing like a Fender. Here's a great booklet about the Williamson amp:
http://www.clarisonus.com/Archives/Amp_Design/Williamson%201952%20The%20Williamson%20Amplifier.pdf
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 25 Mar 2009 5:03 am     Reply with quote

I suspect Ted W. was making an Standel sounding amp,
with/for modern parts availability,
rather than a spot on clone.

Cool file on the Willamson too! Thanks Jussi.
_________________
DLD, Chili farmer. Plus bananas and papaya too.

Real happiness has no strings attached.
But pedal steels have many!
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Marc Jenkins


From:
Victoria, British Columbia, Canada
Post Posted 25 Mar 2009 7:19 am     Reply with quote

I forgot to mention; Weber will have a 25L15 clone kit, as well as the '807' or 'Gaylon' (the name seems undecided as of yet) which will be a 60 watt version tweaked specifically for pedal steel. That's what the above linked schematic is for.
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J Fletcher


From:
London,Ont,Canada
Post Posted 25 Mar 2009 8:59 am     Reply with quote

Obviously not a Standel clone, or anything close to it, really just a BF Fender amp, including the reverb and trem circuits. Different output tubes, and a variable 1st stage gain, but that's about it. Don't imagine it sounds anything like a tube Standel. I'm sure it sounds great, like a BF Fender should!..Jerry
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Michael Brebes


From:
Northridge CA
Post Posted 28 Aug 2009 10:09 am     Reply with quote

The schematic previously posted is all wrong. I would suspect that the following is closer. Looking at the tone stack, it looks correct for all the late 50's or early 60's controls. Some of their amps had the mid(Contour) control and others did not. Ones without Contour is just a straight wire in place of pot. Hope this helps out:
http://www.tedweber.com/schematics/jp25_schem.jpg
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Brad Sarno


From:
St. Louis, MO USA
Post Posted 28 Aug 2009 6:18 pm     Reply with quote

Very interesting circuit. Clever use of inductors, and I'm liking that cap (low pass filter) across the plate resistor at the stage before the phase inverter. Cool stuff.


I was wondering because that Gaylon circuit is VERY Fender-like, but with some super cool tweaks, like the parallel triode input stage (ala Matchless), as well as a few other neat ideas. Were those Ted's designs, or someone else at his place?


Brad
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 28 Aug 2009 7:19 pm     Reply with quote

L1 C20 C21 are all quite interesting.

Cool amp for sure.
I can find an 807 in Bangkok too.
_________________
DLD, Chili farmer. Plus bananas and papaya too.

Real happiness has no strings attached.
But pedal steels have many!
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Jim Strawser


From:
Montana, USA
Post Posted 28 Aug 2009 10:28 pm     Weber Schematics Reply with quote

With all due humility and respect, I suggest you contact TA at Weber website as Ted Weber passed away on 14 AUG 2009. May he rest in peace(for those of you who didnt know) We lost a great man in Ted. God Bless his soul!! Jim from Montana
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 29 Aug 2009 2:21 am     Reply with quote

Oh that is so sad to hear. I did speak with Ted a few times and he was very nice and very helpful.
I knew he was ill, but didn't know it was so far gone.

RIP Ted Weber.
Maybe he should be put in Gone Home now.
As a steel player I played through Ted's speakers many times.
_________________
DLD, Chili farmer. Plus bananas and papaya too.

Real happiness has no strings attached.
But pedal steels have many!
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John Billings


From:
Ohio, USA
Post Posted 29 Aug 2009 7:10 am     Reply with quote

Hmmmmm,,, based on a Williamson? I have a Williamson stashed away. Uses 6550s I think. Maybe instead of ebaying it, I should build the appropriate pre amp,,,,,,,,,?
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David L. Donald


From:
Koh Samui Island, Thailand
Post Posted 29 Aug 2009 8:49 am     Reply with quote

That's what I'd do for sure.
_________________
DLD, Chili farmer. Plus bananas and papaya too.

Real happiness has no strings attached.
But pedal steels have many!
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John Groover McDuffie


From:
LA California, USA
Post Posted 30 Aug 2009 6:47 am     Reply with quote

I could swear I saw the kit on the Weber site a month or so ago, but now it doesn't seem to be up there. Ditto for his "Gaylon" PSG amp, a TV front '52 bass amp, and a few other things. Perhaps his production is delayed due to parts fabrication problems?
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Marc Jenkins


From:
Victoria, British Columbia, Canada
Post Posted 30 Aug 2009 8:25 am     Reply with quote

John Groover McDuffie wrote:
I could swear I saw the kit on the Weber site a month or so ago, but now it doesn't seem to be up there. Ditto for his "Gaylon" PSG amp, a TV front '52 bass amp, and a few other things. Perhaps his production is delayed due to parts fabrication problems?
John, these kits weren't ready to ship yet, but were very close at the time of Ted's death. I spoke to C.J. at Weber on Thursday, and he said that they're going to concentrate on maintaining the current business needs for now. Any new designs are going to be put on hold for the time being.
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