[ARC5] BC-221s, etc.

[Fuqua, Bill L]

Thanks. That is very useful information.
Compare that to Collins or Drake PTO's which change considerably over the years.
73
Bill wa4lav

________________________________________
From: Kenneth G. Gordon [kgordon2006 at frontier.com]
Sent: Sunday, October 16, 2011 4:21 PM
To: Fuqua, Bill L
Cc: ARC5 at mailman.qth.net
Subject: Re: [ARC5] BC-221s, etc.

On 16 Oct 2011 at 14:20, Fuqua, Bill L wrote:

> I have asked this question before but never got a good answer from
> anyone.
>   Has anyone in the past 10 or so years taken a BC221 straight out of
>   the box and
> compared its actual frequencies to its capibration charts?

Although the two that I have were most certainly not NIB, they have
obviously never been messed with internall.

I checked both of them against a modern frequency counter: both were
right on, depending on how closely I could set the various settings.

According to the manual, minimum error should be around 30 Hz. Mine
have always been within about 100 Hz.

The one that I use the most often eventually had to have its 100 Khz
oscillator checked against WWV: I could hear the beat, and it was
around 2 or 3 CPS by counting by ear and comparing with a watch.

At the moment, my most-used one now has an intermittant short in a
capacitor somewhere: it keeps eating rectifier tubes. I have not
taken the time to track that down yet.

Ken W7EKB