[time-nuts] HP 117A
gpbatey at wildblue.net
Mon May 11 14:10:46 UTC 2009
Greetings to all of the timekeepers on the list. I have been enjoying the
discussions here for some time.
I am attempting to get an HP-117A VLF Comparator operational. I had to
change an electrolytic cap in the active antenna and now have a strong
signal into the receiver. I have a problem with the A-7 (00117-6020) plug
in board. This is the same as the A-5 board. The 60 Kc filter in the times
3 multiplier is not working reliably. I suspect the transformers T-1
(00117-8004) or T-2 (00117-8005). Does anyone know where I could get an
additional A-5 or A-7 board or the transformers or a second unit (working or
not)?? Any help would certainly be appreciated.
I picked up some chart paper at a yard sale labeled as follows: Mfg
Amprobe; part numbers 300 SWA and 830W which appear to be the correct size
for the 117A. I have not yet tried it though.
I do have the actual manual and plastic overlay charts which I could copy if
there is an interest.
Reply to WA4FJC at arrl.net or GPBATEY at wildblue.net
<mailto:GPBATEY at compuserve.net>
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 4210 bytes
Desc: not available
More information about the time-nuts