[ARC5] BC-221 and LM on eBay

[MICHAEL ST ANGELO]

I picked up a BC-221 and a neighbor gave me a LM frequency meter. He was a high school physics teacher and one of his students gave it to him.

What is the published frequency accuracy of these meters? The only notes I could find online is this observation by VE3BDB. He read in the manual that that the maximum error will occur when measuring a 4 MHz signal at minus 30 degrees C where an error of 1.355 KHz (0.034%) could occur. His observations indicated that the BC-221 is easily capable of 250 Hz accuracy on 80 & 40 M.

<https://www.qsl.net/ve3bdb/bc221observations.htm>

Mike N2MS


> On 03/28/2022 8:38 AM Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>  
> Hi
> 
> As an “all in one” gizmo for keeping a pile of HF radio gear tuned up,
> I still would put the LM / BC-221 pretty close to the top of the list. Yes,
> there would be other things on the list as well. With care, you can do a 
> lot of things with one of them.