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Rimfire1022
Guest
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 Posted:
Mon Jan 03, 2005 4:18 am Post subject:
Help w/Dyna FM1 |
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I was hoping someone could tell me the value of C29 on board PC-8 of an FM 1...
I have the schematic for the FM 3, but the 1 is a bit different, it does not
use the PEC on the PC-8 board...The one I am working on looks like a .0001
silver mica cap....
TIA
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Chris Hornbeck
Guest
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| Posted:
Mon Jan 03, 2005 7:49 am Post subject:
Re: Help w/Dyna FM1 |
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On 02 Jan 2005 23:18:13 GMT, rimfire1022@aol.com (Rimfire1022) wrote:
| Quote: | I was hoping someone could tell me the value of C29 on board PC-8 of an FM 1...
I have the schematic for the FM 3, but the 1 is a bit different, it does not
use the PEC on the PC-8 board...The one I am working on looks like a .0001
silver mica cap....
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My manual shows C29 as the coupling cap feeding the top of the
volume control, " .47mfd @ 100 v." , which today we'd call
0.47 uF @ 100 WVDC. Seems kinda high, but any mica is likely
too small.
Good fortune,
Chris Hornbeck
"They'd meet at the Tout Va Bien."
-JLG, _Bande a part_, 1964 |
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Steve O'Neill
Guest
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| Posted:
Mon Jan 03, 2005 7:50 am Post subject:
Re: Help w/Dyna FM1 |
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Hi:
You must have PNs mis-stated below: C29 on PC8 lists as 0.47uF/100V. If
your FM1 is still mono maybe you're looking for the value of the de-emphasis
network cap C28 (0.0075uF). When converted to stereo, the de-emphasis
network is replaced with a different RC network designed to accentuate the
pilot/subcarrier level. On the FM1 this alternate network is implemented
with discrete components; on the FM3 a PEC used.
--
Steve
"Rimfire1022" <rimfire1022@aol.com> wrote in message
news:20050102181813.08198.00003193@mb-m04.aol.com...
| Quote: | I was hoping someone could tell me the value of C29 on board PC-8 of an FM
1...
I have the schematic for the FM 3, but the 1 is a bit different, it does
not
use the PEC on the PC-8 board...The one I am working on looks like a .0001
silver mica cap....
TIA |
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