[ARC5] BC-221-J vs BC-221-T or what?

[John Hutchins]

I believe that in some models, the ID plate center bottom, can be 
removed to adjust the freq of the calibration circuit ?
Hutch



On 2/12/2016 9:13 PM, Richard Knoppow wrote:
>    Somewhere I found a military TM that covers all of the BC-221 
> meters. Noton BAMA and I can't find it. It may help because at least 
> it would tell you what differences are between them.  I have a BC-221, 
> a late one with factory power supply. I have to look to see which 
> version it is.  Its in a wooden case which makes setting the crystal 
> calibrator difficult since it drifts a little with temperature and I 
> don't want to drill a hole in the case. It is quite accurate once 
> warmed up.
>
> On 2/12/2016 4:38 PM, Don Merz via ARC5 wrote:
>> I guess the time has come for me to keep one of these in the shack. I 
>> have had literally dozens of them go through my hands over the years. 
>> Now I have two here and one of them is going to stay. But which one? 
>> The J model is in lesser condition. The T model is almost like new. 
>> Both have AC supplies in them--the one in the T model might be a 
>> factory supply. The one in the J model is almost certainly homebrew. 
>> Both have the spare tubes and hex wrench where they ought to be. Both 
>> have the correct calibration books. Both were made by Zenith.
>>
>> Is there any reason to prefer one over the other except overall 
>> condition? I have not tested them yet. But it does not seem like they 
>> would be hard to get running. Is there an achilles heel in them that 
>> I should check?
>>
>> Any suggestions welcome.
>> 73 de N3RHT
>>
>>
>>
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>
> -- 
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
>
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