flemming
Well-known member
This isn't necessarily an endorsement, just sharing my experience. I picked up a some MP38A and P28 transistors from this ebay seller:
www.ebay.com
I grabbed 20 of each (The listing quantities were different at the time). Before buying them I reached out to the seller to see about combining shipping. Because the items were already discounted eBay wouldn't let me automatically group them together. The seller got back to me right away and made a custom listing for these two items with reduced shipping. Shipping for one item was $9.80, combined it was $12. Grand total was $37.55 for 40 total. They arrived from the Ukraine in slightly less than 1 month.
I plugged all of them into a breadboard so I could let them sit for a while and not touch them while testing. Results were as follows:
P28 - hfe 50-80 (one outlier of 120), leakage was 16-27uA
MP38A - hfe 50-60 with a few slightly outside that range, leakage 82-140uA (2 were > 200, half were < 100uA)
These were tested with a TC-1 so given what was said here the above may not be the most accurate.
Security Measure | eBay
6x Germanium Transistors NPN MP38A alt 2SD195 2SD33 OC75 Tone Bender Fuzz USSR | eBay
Similar to the 2SD195, 2SD33, OC75, 107NU70. Made in USSR. Power dissipation 0.15W. Maximum temperature 85°C. Forward current transfer ratio (hFE) 45-100. Maximum collector current 20mA.
www.ebay.com
I grabbed 20 of each (The listing quantities were different at the time). Before buying them I reached out to the seller to see about combining shipping. Because the items were already discounted eBay wouldn't let me automatically group them together. The seller got back to me right away and made a custom listing for these two items with reduced shipping. Shipping for one item was $9.80, combined it was $12. Grand total was $37.55 for 40 total. They arrived from the Ukraine in slightly less than 1 month.
I plugged all of them into a breadboard so I could let them sit for a while and not touch them while testing. Results were as follows:
P28 - hfe 50-80 (one outlier of 120), leakage was 16-27uA
MP38A - hfe 50-60 with a few slightly outside that range, leakage 82-140uA (2 were > 200, half were < 100uA)
These were tested with a TC-1 so given what was said here the above may not be the most accurate.