Thanks, that's exactly the sort of info I was hoping for.I have had good luck with MP38A's. I've used them in multiple Dizzy Tones with great success. I have an Aft I can try them in tomorrow if you'd like.
I bought a bag of 20 a while back and here you can see the gain and leakage spread: https://photos.app.goo.gl/p7irixpTFCha6Uf27
Thanks, that's exactly the sort of info I was hoping for.
I bought some MP38s from Omsk a year or two back. Very affordable and I still have plenty. I googled the address (using google to decipher the cyrillic writing) and found the rather bleak looking apartment block of the seller. Fascinating! It took a while for them to arrive in Australia but they did, and shipping was laughably cheap.
I've had excellent results with Russian Ge transistors. Much better than with the duds you get from western Europe these days.
Stop by sometime. I make a good cup of coffee.And yes, I have driven past some of your homes using Google Street View. Don't judge me.
I have a stash of 2N1308s too, and they can work ok. They might be slightly brighter sounding than the Russian ones, but there's not much in it. IME they are a little fussier about bias than the Russian ones.MP38A and P28 find their way onto a lotta boards I build. I also have a stash of 2N1308 and 2N1309. The MP38As tend to be leaky, which can be a good thing or a bad thing depending on the pedal. In any case, plan on testing and auditioning the Ge transistors because some will sound better than others, again depending on the specific pedal. To get Ge transistors to bias correctly, it is common to cherry-pick them or fiddle the bias resistors.
And yes, I have driven past some of your homes using Google Street View. Don't judge me.
Here are a few East Bloc eBay sellers that I've had good results from.I have heard and read about Russian made trannys they’re much better quality for a fair price IF you know where to go , bringing me right to my question can you recommend a place to go to for like surplus Russian stuff?
Thank you very muchHere are a few East Bloc eBay sellers that I've had good results from.
sp9tnm on eBay
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No, that was his mom.
I think that may be who I got my MP38A's from as well.I ended up ordering some MP38As from this seller in Omsk:
I haven't bought from him before but I've seen him recommended on forums and his store is full of Soviet-era goodies.Security Measure
www.ebay.com
I also bought an Aft and a couple of other PCBs because sale. Yay!
There are a lot of good sourcing suggestions here, but the actual part number doesn't matter as much as the individual gain (hfe) and leakage (Iceo on some testers) values, which vary a lot even between the same part# & lot.
A good rule of thumb is to look for hfe greater than 50 and leakage below 200uA. Some builds will require higher hfe values, so you may want to look into spending more on pre-tested transistors if you need a certain range.