Nice find. In my collection I also have a 1101, as well as its big brother the
1103. The 1103 is very similar in looks, but has a row of push buttons on the
front. I have a manual for the 1103, not for the 1101.
Bill v
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of Nick
Sent: Friday, June 12, 2015 6:49 AM
To: neonixie-l@googlegroups.com
Subject: [neonixie-l] Heathkit IB-1101 Frequency Counter
Paid a visit to the The British Vintage Wireless and Television Museum
http://bvwm.org.uk/ which is an extraordinary place - over 1,000 vintage
radios and TVs from the 1920s onwards, most of which (including the TVs) have
been restored to working conditions - mainly one man's obsession... just round
the corner from John S and next to my old school - I never knew it was there
when I was at school, but that was a while ago and I wasn't that interested in
that stuff back then :)
Anyway, they had a swap table for people tpo bring stuff they didn;t want any
more which was sold to raise money for museum funds...
I swore I wasn't going to ever buy any more nixie stuff, but then...
...I picked up an Heathkit IB-1101 0-100+MHz 5-digit frequency counter for a
pound (about USD 1.55), including its manual. Interestingly, the use Annn for
resistors, Bnnn for capacitors and Cxxx for valves and ICs... Note the long
tube in one photo - this is a multi-turn 1-30pF trimmer for the timebase. The
XTAL is especially selected for good accuracy and temperature stability (so the
manual says!) - they claim 1ppm/month after leaving it on for 30 days...
Tubes are NL950S (or B-5859S) - all are socketed. When I got it one of the
drivers had gone and its was pretty filthy, but otherwise fine... nicely made
unit...
Nick
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