P-2356 transistor for Maestro Boomerang Wah  [found/sold]

Looking for a particular component or hardware part and you just cannot find it? Got comoonents surplus and want to get rid of it? Post it all here... No sales of working pedals, put these in the 'Seen for sale' section please.
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fernieite
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Post by fernieite »

Hi all,
Is there anyone here who'd be able to sell me a replacement P-2356 transistor for my 1967 BG-1 Boomerang? If anyone would have one, it would be one of you excellent guys. :thumbsup
My tech has determined that one of the original trannys needs to be replaced. (noisy)
Thanks a lot.
Sean. (Toronto)

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plush
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Post by plush »

Ehm... Why not replace it with a modern generic one, like 5088, 3904, etc.?

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fernieite
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Post by fernieite »

Hi Plush,
Well, maybe that'll work. We couldn't find any information regarding these P2356 trannys.
A 5088 or 3904 is a direct replacement?
Have you got a link to where I could buy one?
Thanks a lot!

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mozz
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Post by mozz »

Looking at the pictures, it appears to be like a old 2n2924 or 2n3391 package, TO-98. I would use a lower gain npn, 200-300hfe max. That's a quite collectable pedal so if anything, you want a period correct replacement. I think i have some that are close with the green dot painted on top, maybe they were out of a Wurlitzer/ Cordovox/ Lowrey/ Baldwin? I think Gibson/Norlin owned 1 or all of these at one time. Maestro was Gibsons pedal name of the Fuzz FZ1 etc.
Last edited by mozz on 14 Oct 2020, 00:51, edited 1 time in total.

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fernieite
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Post by fernieite »

Thanks Mozz!

Looks like some other guy was looking for a replacement too...
https://www.diystompboxes.com/smfforum/ ... c=121168.0
Last edited by fernieite on 15 Oct 2020, 10:01, edited 2 times in total.

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mozz
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Post by mozz »

I've got a bunch so if you are in the US let me know, i will mail 1 out. Ideally you should measure the gain of the remaining one and i can match it up for you.
Measured a few, large green dot are 425hfe and small green dot are 285hfe, i have yellow and orange also. I remember looking these up and they didn't print the first few part numbers, may have been 991
20201013_205814.jpg

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fernieite
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Post by fernieite »

Oh, cool! Those definitely look the part Mozz. Mine have green dots too. :mrgreen:

I'll get Derek (my amp/pedal tech buddy) to measure the hfe, and I'll pm you with my details. I'm in Toronto (Canada) so I'll PayPal you for the cost + your time and effort + usps shipping.

Thanks a lot man!

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fernieite
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Post by fernieite »

Update: So, for the record, the original P-2356 transistors in my BG-1 measured 281 and 304 Hfe. They are NPN silicon.

Looks like Mozz's small green dot ones are the ones I need.

PM sent! :applause:

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