[ARC5] Spotting

[J. Forster]

The BC-221 & LM are BOTH a source and receiver. It can be used to spot
either a receiver or transmitter to the same frequency.

-John

================





>   Hello Tom,
>   John refers to the BC-221; this is the instrument used to set the
>   operating frequency of the command sets.
>   The operating frequency would be given in "orders for the day" (or
>   similar), and the "gear" set on frequency in the early hours of the
>   day - by a tech.
>   The BC-221 was battery operated and dragged around on some sort of a
>   trolley.
>
>   You'll find a circuit of the BC-221 easily.
>   The instrument is a hetrodyne frequency meter - a tech sets the BC-221
>   to the desired frequency using the calibration handbook  (in the front
>   of the instrument).
>   Using head-phones, the tech would listen to the 'beat' between the
>   BC-221 meter, and the transmitter.
>
>   I've owned several '221s - they are a lovely instrument from that era.
>   - Simple but elegant.
>   I still own 2 - gave the rest away to operators who use gear from this
>   period.
>   John also mentions the "LM".  This is a variant of the BC-221, in
>   other words a frequency meter, but UK (I think).
>   I've only seen one or two LMs.  One (a rusted hulk) was bought for
>   restoration.
>
>   Collecting (and operating) these sets is a wonderful interest.
>
>
>   73 de Les Smith
>   vk2bcu at operamail.com
>
>
> On Fri, Nov 8, 2013, at 6:38, J. Forster wrote:
>> BC-221-xx or LM-xx
>>
>> -John
>>
>> ======================
>>
>>
>>
>> >
>> >
>> > I am new to operating the command sets and have some questions for the
>> > list. I am building an authentic setup using dynamotors in both
>> receivers
>> > and transmitters and have the shelving desgin to hold it all just
>> about
>> > complete thanks to Mike (you know who you are) How did they back in
>> the
>> > day spot the receive and transmit frequencies to each other? Did they
>> do
>> > it live on air or was there a way
>> > to do it without transmitting? I am also looking for a BC348 and ART13
>> to
>> > go with my setup and will be in Phoenix, Az. during the week of
>> November
>> > 19th through the 22nd in case anyone has Command sets they are looking
>> to
>> > unload.
>> >
>> >
>> >
>> >
>> >
>> >
>> > Thank You
>> > Tom ElmoreKA1NVZ
>> > Anchorage, Ak
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