• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Standee resistor identification tx-200.

Carbsandcaps

Carbsandcaps

Super Member
I need some help identifying these standee resistors on my tx-200 solid state amp. They each have 4 legs and one is measuring open all the way around. The wiring schematic isn’t much help as I believe it shows stand alone resistors. One goes to the speaker impedance switch and the other to the speaker protection fuses? The numbers are 50,500-3b. I’ll include the section of the schematic where they should be.
 

Attachments

  • IMG_9318.jpeg
    IMG_9318.jpeg
    114.7 KB · Views: 24
  • IMG_9317.jpeg
    IMG_9317.jpeg
    148.2 KB · Views: 23
  • IMG_9349.jpeg
    IMG_9349.jpeg
    76.7 KB · Views: 21
  • IMG_9350.jpeg
    IMG_9350.jpeg
    126.6 KB · Views: 20
Register to hide this ad
Those packages are 2 separate resistors. One is switched to be in series when using a 4 ohm load. The other is in series with the remote speaker terminals to raise the total impedance if both main and remote speakers are being used.
 
fred soop said:
Those packages are 2 separate resistors. One is switched to be in series when using a 4 ohm load. The other is in series with the remote speaker terminals to raise the total impedance if both main and remote speakers are being used.
Click to expand...
Oh ok. I was looking at the diagram again. That explains why one is 4ohms. Thanks for the info!
 
Those 2 resistors connected to the metal filter Cap look burned and swelled.

The 2 smaller (West German) electrolytic caps need checked/changed. I've never see one survive this long.
 
jvstratman said:
Those 2 resistors connected to the metal filter Cap look burned and swelled.

The 2 smaller (West German) electrolytic caps need checked/changed. I've never see one survive this long.
Click to expand...
Ya the right side transformers shorted and that resistor was next in line. It’s getting a full recap and those 220ohm resistors are getting replaced but I wanted to make sure I had all the info before I start digging in.
 
Frako and Ducati caps in Fishers are #1 and #2 in my personal TOP TEN Most wanted list. Find 'em, grab 'em, Nuke 'em. I have yet to find one that hasn't spilled it's guts and still read good. 99% of the time one or both end's are bulged or blown out.

I don't have any Standee's that fit your spec's. Wattage ratings 10W on all sections so you could use individual resistors.
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom