Mal
Would
appreciate a confirmation from you or anyone who has converted a
5501-9f:
For
each of the 3 tank assemblies, I added 2 x 100 nF parallel connected Wima Cs
in series with the C5-C12 bank. This then matches the C13-C22 bank
giving 10 series/parallel 100nF in each bank. I also removed C23 4.7 nF
connected in parallel with C5-C12 and C24 4.7 nF connected in parallel
with C13-C22. Removal of C23 and C24 wasn’t mentioned in the G0MRF conversion
notes.
I
am driving with one of the 5 MHz DDS from eBay. This allows an easy sweep
across the frequency range to check everything peaked on 137 kHz, with no
guard current showing. The signal looked clean on my
SDR-IQ.
73
Terry
Mal
A
coincidence you should ask!
I
finally got round to building a big variable PSU (20 Amp Variac feeding a 3kVa
site transformer + bridge rectifier and capcaitor) did the mods to the 5501
and it fired up perfectly. At least 5A antenna current showing on the meter
and my 1200 Watt dummy load warming nicely. Input 67 Volts at 22
Amps.
Thanks
very much for the Tx. Just Have to sort out the antenna
now.
73
Terry
Have you
fired the big rocket yet ?
----- Original
Message -----
Sent: Monday, May 07,
2012 2:41 PM
Subject: LF: RE: LF QSO -
UK / EU?
Hi
Chris
Just
to let you know I am copying you in GW!!
Sorry
no Tx.
73
Terry GW0EZY - IO82HO 12k West Welshpool
Does
anyone want a QRSS / DFCW (or even a CW !) QSO on LF
?
I've
been calling and sending test signals for ages on 137.7 kHz and will be in
the shack for another hour or so.
