[Boatanchors] BC-221's spoken for

[Richard Knoppow]

      I have a BC-221 that I've had for years.  The 
calibration is right on the nose.  Its only problem is that 
the crystal calibrator drifts a little.  Its difficult to 
get adjusted because the meter is in a wooden case which 
acts as an oven and must be removed to get access to the 
trimmer.  I have considered drilling a small hole in the 
back to get to it but never have.  The amount of drift is 
still very small compared to the specs.  Its really still a 
useful instrument.  Mine also still has the original 
headphones in the lower compartment.  It also has an AC 
power supply.
     Note that there are several versions of both the LM and 
BC-221 with small variations in the circuits.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com


----- Original Message ----- 
From: "Bill Cromwell" <wrcromwell at gmail.com>
To: "Pete Lancashire" <pete at petelancashire.com>
Cc: <boatanchors at mailman.qth.net>
Sent: Wednesday, September 26, 2012 11:21 AM
Subject: Re: [Boatanchors] BC-221's spoken for


> On Wed, 2012-09-26 at 10:34 -0700, Pete Lancashire wrote:
>> I use to have a copy of an article from a trade rag that 
>> described and
>> showed the
>> machine that produced the frequency to position lookup 
>> tables.
>>
>> Has anyone see such, or have information on it ?
>>
>> -pete
>>
>
> Hi Pete,
>
> We can generate a new table for an LM or 221 with a spread 
> sheet now.
> The units that don't have the book that goes with them 
> still have value
> because of that. Both of my LMs have the books with 
> matching serial
> numbers but I used the same approach to generate a tuning 
> chart for my
> RAK-7. After all these years those two LM's and their 
> charts are right
> on the money when compared with other, more modern gear 
> and against WWV.
> I have a small card that is attached to the RAK and The 
> tables that came
> from the spread sheet coincide exactly with the dial 
> numbers that were
> used for the old shore stations. Today they align with the 
> AM broadcast
> stations at the bottom of the broadcast band. The RAK 
> chart is new and I
> will be checking it out further but so far the same method 
> as used for
> the LM tables is spot on for the RAK, too.
>
> I have copies of DOS programs for regenerating a new table 
> for the LM or
> BC-221 that I can attach to email if you need. I looked 
> for the web page
> for downloading but it's all crapped up with other junk 
> they want you to
> buy first. Sell you a downloading utility cuz yer too dumb 
> to download a
> small file without crutches and wheelchairs.
>
> 73,
>
> Bill  KU8H
>