[Hallicrafters] Bama assistance requested.
Roy Morgan
roy.morgan at nist.gov
Mon Apr 4 12:27:48 EDT 2005
At 12:51 AM 4/4/2005, Peter May wrote:
>Hi Skip,
>Try this link, scroll down until you come across BC-221.
>http://www.fernblatt.net/m7.html#a1233
>You might find pictures and a schematic. Hope this helps.
BC-221 folks,
All the LM and BC-221 frequency meters I have contain a one megacycle
crystal for calibration, yet the above link says:
"Three tubes with a builtin crystal (250KHz) calibrator produces audio
output every 250KHz. "
Also, my frequency meters create a host of beat notes, some loud some not
so loud all across the range, not just every 250 kc. Looks to me like the
author of the entries copied one erroneous entry for each of the BC-221
units listed.
Roy
- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Cell 301-928-7794
Work: Voice: 301-975-3254, Fax: 301-948-6213
roy.morgan at nist.gov --
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