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 hope that’s enough information as I don’t yet have a model number. If anyone might have a cross reference number that could be used here that would be great. Thanks,
Mauro
Sent from my iPhone
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.
Thank you Jay!! Much appreciated, Mauro
Sent from my iPhone
On Mar 3, 2023, at 4:21 PM, Jay Hennigan via Jukebox-list jukebox-list@lists.netlojix.com wrote:
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.
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