Thread: Eico GDO coils
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Old September 22nd 08, 09:00 AM posted to rec.radio.amateur.antenna,rec.radio.amateur.equipment
charrid charrid is offline
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First recorded activity by RadioBanter: Sep 2007
Posts: 13
Default Eico GDO coils

On Sep 22, 8:37*am, Jeff Liebermann wrote:
On Sun, 21 Sep 2008 22:25:33 -0700 (PDT), charrid
wrote:


"dried out". *If everything looks like it's working (display lights up
and digits change when thrashing the buttons), then it might be the
time base oscillator or dividers. *Try an external time base
oscillator in case the crystal has quit. *


Power supply was also my first thought, but Nixies light up and if I
try hard, I can change some digits. Time base fault sounds like a
good bet. Thanks for the hint.

Photo of the counter at bottom of page:
http://www.k5cm.com/k1ggiFMTMethod.htm

I have already emailed k5cm asking if he has the manual

The have a few manuals online:
http://www.ietlabs.com/pdf/Manuals/index.html
but not the GR1192B. *Send them email as I'm sure they have a printed
copy in the archives that only needs to be scanned. *Maybe just the
schematic and block diagram.


I did get to ietlabs site in my first searches. Never thought of
mailing them for a scan, though. I'll give them a try.


old equipment all too often:
http://802.11junk.com/jeffl/pics/home/slides/lab.html
Note: *It's a lab, not a museum.


I don't think 20-30 year old HP's are at all museum pieces - they are
still in their prime.

Cool. *One question. *Is the frequency range of the Eico the same as
the Heathkit ranges that I listed? *I'm curious.


Eico 710 has 8 coils starting below AM BC band:
L1 0.4 - 0.7
L2 0.7-1.38
L3 1.38-2.9
L3 2.9-7.5
L4 7.5-18
L5 18-42
L6 42-100
L7 100-250

Rich, OK8RF

--
Jeff Liebermann * *
150 Felker St #D * *http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann * * AE6KS * *831-336-2558