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Clarion AC-60 (continued)
5/14/2013 9:10:03 PMByron Taylor
Tom:
I had trouble posting a reply to your response to my questions. Thanks very much for your help. I wasn't sure if some or the 2000k DC resistance was in primary of the input transformer. I will make that assumption when I order a replacement for the transformer. With regard to the capacitors, the schematic did not specify electrolytics so I assume unpolarized will do. The RCA data sheet for the 24A tube as detector specifies 250K for the plate resistance at 250 volts. I don't know what this means for the for the impedance for the input transformer.
Thanks again
5/15/2013 1:07:42 PMTom McHenry
:Tom:
:I had trouble posting a reply to your response to my questions. Thanks very much for your help. I wasn't sure if some or the 2000k DC resistance was in primary of the input transformer. I will make that assumption when I order a replacement for the transformer. With regard to the capacitors, the schematic did not specify electrolytics so I assume unpolarized will do. The RCA data sheet for the 24A tube as detector specifies 250K for the plate resistance at 250 volts. I don't know what this means for the for the impedance for the input transformer.
:Thanks again
:
= = = = =

I'm not sure where the "2000k" figure came from. Did you mean "2000 ohm", which was the resistance spec for the L2 inductor?

If your L2 filter is bad, to order a replacement you will need to specify its inductance value, current capacity, and voltage rating. The DC resistance will "be what it is" after these parameters are satisfied. An ideal filter inductor would be zero ohms resistance to DC and infinite ohms to AC (at some frequency).

Caps don't have to be electrolytic. However, as you exceed 1 MFD, high-voltage non-electrolytics tend to become both fairly large, and expensive. The caps in your set's filter block unit probably weren't electrolytic (but they were large, and, for the time, expensive!)

Don't know what to say about the interstage transformer. I would say that a 1:1 with a 20K input (and output) impedance would work OK, but that's just a guess. Since the Type 24 tube isn't a power triode, it may need something that is much higher in impedance to work correctly without being overloaded.

5/15/2013 3:41:04 PMByron Taylor
::Tom:
::I had trouble posting a reply to your response to my questions. Thanks very much for your help. I wasn't sure if some or the 2000k DC resistance was in primary of the input transformer. I will make that assumption when I order a replacement for the transformer. With regard to the capacitors, the schematic did not specify electrolytics so I assume unpolarized will do. The RCA data sheet for the 24A tube as detector specifies 250K for the plate resistance at 250 volts. I don't know what this means for the for the impedance for the input transformer.
::Thanks again
::
:= = = = =
:
:I'm not sure where the "2000k" figure came from. Did you mean "2000 ohm", which was the resistance spec for the L2 inductor?
:
:If your L2 filter is bad, to order a replacement you will need to specify its inductance value, current capacity, and voltage rating. The DC resistance will "be what it is" after these parameters are satisfied. An ideal filter inductor would be zero ohms resistance to DC and infinite ohms to AC (at some frequency).
:
:Caps don't have to be electrolytic. However, as you exceed 1 MFD, high-voltage non-electrolytics tend to become both fairly large, and expensive. The caps in your set's filter block unit probably weren't electrolytic (but they were large, and, for the time, expensive!)
:
:Don't know what to say about the interstage transformer. I would say that a 1:1 with a 20K input (and output) impedance would work OK, but that's just a guess. Since the Type 24 tube isn't a power triode, it may need something that is much higher in impedance to work correctly without being overloaded.
:

As you suspected, I meant 2000 ohms for the inductor DC resistance.

Thanks again for your comments



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