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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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24th Sep 2019, 10:46 pm | #1 |
Pentode
Join Date: Jun 2013
Location: Worthing, West Sussex, UK.
Posts: 223
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Hro-5m psu
I am restoring an HRO-5M, that is in excellent condition. However the 697 Rack PSU was not. I started rebuilding it aabout 5 years after it had cooked itself but not finished it.
Can anyone tell me the correct values of filter components C112, 113 and 114, also the inductance of L102. I have copious amounts of paperwork, but cannot find PSU details. Andy G3UEQ |
25th Sep 2019, 12:09 am | #2 |
Heptode
Join Date: Apr 2009
Location: Scratby, Norfolk, UK.
Posts: 648
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Re: Hro-5m psu
Hi Andy,
C12/13/14 are 8 +8 +8 MicroFarads at 475 VDC working L2 is 17H Manual with all details is at BAMA Archive go to National, and then to item hrops. Kind regards Dave G0ELJ |
25th Sep 2019, 8:26 am | #3 |
Pentode
Join Date: Jun 2013
Location: Worthing, West Sussex, UK.
Posts: 223
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Re: Hro-5m psu
Thanks Dave.
I have luckily a suitable choke near that value rated at 125mA, so that will work nicely. Cheers Andy |