NTE234 and NTE232 seem pretty common in these
At least, as a more-or-less direct replacement. I recently did a 5721 preamp and am working on a 5781 power amp and I'm about to run out of the batch of about 20 (or whatever the discount qty is) I bought.
When I did my 7871, I believe I used the OPA2134 in the tuner and one other place - it's been years, can't remember exactly where. It was already very good, that was possibly gilding the lily. The other transistors were all fine according to my cheapo testers and in-circuit measurements (i.e., voltages per the SM).
If your receiver is anything like those you may want to go ahead and invest in some 2n3904s, as well :thmbsp:
I can look at my notes and give you the Philips part number, their part description, and what I used, but it may be a day or so.
At least, as a more-or-less direct replacement. I recently did a 5721 preamp and am working on a 5781 power amp and I'm about to run out of the batch of about 20 (or whatever the discount qty is) I bought.
When I did my 7871, I believe I used the OPA2134 in the tuner and one other place - it's been years, can't remember exactly where. It was already very good, that was possibly gilding the lily. The other transistors were all fine according to my cheapo testers and in-circuit measurements (i.e., voltages per the SM).
If your receiver is anything like those you may want to go ahead and invest in some 2n3904s, as well :thmbsp:
I can look at my notes and give you the Philips part number, their part description, and what I used, but it may be a day or so.