3 Mar
2023
3 Mar
'23
1:20 p.m.
On 3/3/23 12:57, M De Simone via Jukebox-list wrote:
A fellow jukebox repairman asked me if I knew of a substitute for this FET transistor. I do not, since I work predominantly on tube amplifiers. So I thought I’d ask the group here and see if I could help him out. It is Q18 on the “mute and squelch board” and Rockola part # 52342 and the part description is: N - Channel Junction FET.
I don't have a direct cross-reference but it looks like a common small signal JFET. Pretty sure your amp is for a model 478 or similar vintage. 2N547 or 2N5486 in TO-92 plastic case or 2N4857A in TO-18 metal case should work fine. -- Jay Hennigan - jay@west.net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV