UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Argus25 · 16th Apr 2019, 11:23 pm

If you want to stick to germanium, I can see your dilemma, the 2N2147 does have a high range hfe, and a high-ish collector voltage rating, so ideally you would use a replacement that was at least similar. One possibility is the 2N1906, hfe min75, these appear cheaper than the 2N2147:

https://www.ebay.com/itm/2N1906-TRAN...YAAOSwCGVX2Vhr

but it might be a pest for you to have to get them from the USA.

An AD142 and AD143 also comes in high hfe variants, grade 5 & 6, but these may be harder to get. Check out the stock at Halbleiter:

https://www.sh-halbleiter.de

16th Apr 2019, 11:23 pm	#16
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: Replacement power transistors hfe. If you want to stick to germanium, I can see your dilemma, the 2N2147 does have a high range hfe, and a high-ish collector voltage rating, so ideally you would use a replacement that was at least similar. One possibility is the 2N1906, hfe min75, these appear cheaper than the 2N2147: https://www.ebay.com/itm/2N1906-TRAN...YAAOSwCGVX2Vhr but it might be a pest for you to have to get them from the USA. An AD142 and AD143 also comes in high hfe variants, grade 5 & 6, but these may be harder to get. Check out the stock at Halbleiter: https://www.sh-halbleiter.de