[Boatanchors] leaky cap data point
Phil
ko6bb1 at gmail.com
Tue Sep 22 21:39:24 EDT 2015
Bill,
Do you mind sharing with us how you 'safely' get into those CFLs?
73 de Phil, KO6BB
http://www.qsl.net/ko6bb/ (Web Page)
PRESENT RADIOS:
Grundigs: S-350 (~2006), G6 (2011) & S450DLX (2014).
HOMEBREW: 7 Tube+Rect Regenerative RX for LF (built 2015)
Icom: R-75 With Cascaded 250 & 125Hz CW Filters. (~2005)
Icom: IC-7200 Transceiver (~2015).
Radio Shack: DX-380 digital portable (~1990).
SDR: Softrock Ensemble LF On Loan
Zenith: Royal-7000 Transoceanic Portable (~1968).
ACCESSORIES: HOMEBREW LF-MF Pre-Amp, MFJ-993B HF Auto-Tuner.
HOMEBREW 8 Hz Audio Filter.
ANTENNAS: 88 foot Long Ladder-line fed dipole at 35 feet AGL for MW/SW.
HOMEBREW Active Mini-Whip at 36 Feet AGL for LF/MW/SW.
HOMEBREW 37 foot "Low Noise Vertical" at 11 feet AGL for LF/MW/SW.
Merced, Central California, 37, 18, 37N 120, 30, 6W CM97rh
On 9/23/2015 1:18 AM, Bill Cromwell wrote:
> Hi
>
> I had a little time to go into an old AM-FM-SW receiver from the 1940s
> to examine the caps with my "new" Heathkit C-2. I haven't played with
> the C-2 very much and I wondered if *all* of those old caps could be
> *that* bad. So I got out some caps I have recently bought(in this
> century) and the C-2 likes every one of them. I'll inventory what is
> needed in the radio (all of the paper and electrolytic caps) but I'm
> guessing I will be replacing around a dozen or so caps. The
> electrolytics in the pwr supply filter are dead short! I probably have
> all I need right here. The power supply caps are only 40-20-20 at 200
> volts and I think I have some good ones near that value harvested from
> curly CFL bulbs. I hate those high power RFI generators but they do
> have a few nice parts inside:) I don' wait for them to fail before the
> harvest <evil grin>.
>
> After running the leakage tests on the new caps I was really surprised
> at the fat, loud sparks I drew when I discharged them! I suppose they
> are in good condition. I have more confidence in the C-2 now an old
> radio will soon be coming back to life.
>
> 73,
>
> Bill KU8H
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