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| Tektronix 531A How fast is it and what plugins will it accept |
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| Aperna1985:
Hey guys I have a Textronix 531A, once I changed the plug-in that was in it, it worked perfectly. I'm working on an FM radio and I'm trying to measure the oscillator frequency which is 90 Mega Cycles. So I'm looking for a plug-in that will allow me to run at that speed. I currently have the type K plugin. Which I think is only good for 15 MHz. I see there's a 1A7 that looks very fast will my scope accept that? Or is there other good choices? I have a Tek 536 also that worked once I changed the plugin. If that is a better choice to use, I'm willing to use that. |
| PwrElectronics:
A 531A scope is rated for 15Mhz at -3dB. At 90Mhz, you may be able to see a signal but it will be reduced amplitude. I don't know what sort of AM radio you are working on but the typical consumer ones in the US would have a oscillator at 455kHz. No matter what plug in is used, you are limited by the main scope chassis. Usually there is no need to look at the oscillator directly. Lots of info on working on AM radios out there. Info on the 531 and 531A is here: https://w140.com/tekwiki/wiki/531A |
| xrunner:
--- Quote from: Aperna1985 on January 17, 2024, 12:44:22 am ---I'm working on an AM radio and I'm trying to measure the oscillator frequency which is 90 Mega Cycles. --- End quote --- What make and model AM radio is this? |
| Aperna1985:
I'm sorry guys I made a mistake it's an FM radio. I normally work on Am stuff, this is my first FM I'm doing. I'm going to correct it in my post. The radio is a Channel Master 6534 AM Fm radio no have the Am portion working perfectly but Fm is completely dead. I can pass 10.7 mhz through it but can't pick up any stations it's just silent. If I could attach a PDF I'd show you guys the Schematic. |
| rvalente:
A Textronix 531A and 90 mega cycles we are definitely talking vintage here, post some pics. You can "attach" things using the + square button bellow the message text box while posting. |
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