[AMRadio] AMRadio Digest, Vol 118, Issue 7

rbethman rbethman at comcast.net
Sun Nov 3 10:36:28 EST 2013

Consult the manual, specifically the MC-109 modification.

There is ALSO a component that MUST be jumpered to take it out of the 

The TU for 160, the PA Coil, and the fixed vacuum cap for such must also 
be available.

Failure to install that jumper WILL destroy a component!

The same applies when taken back off 160.

It is thoroughly covered in the manual.

My particular instance was having to modify the 2.0 to 2.5MC Tuning 
Unit.  By doing this mod, I can get down to 1.6MC.

Bob - N0DGN

On 11/3/2013 10:22 AM, Mike Sawyer wrote:
> I don't know of any other modification other than a padding cap in the tank
> circuit which clips right in. If you have the proper coil and MO, then there
> isn't any problem at all. As a matter of fact, I was able to acquire a 2.5
> Mhz coil and MO for my buddy's BC-610. He just had to re-tune the MO so it
> would oscillate in the 160M (I think the lowest he could go was 1880). But
> other than that there weren't any issues. Just my watt meter's worth.
> Mod-U-Lator,
> Mike(y)
> ----- Original Message -----
> From: "rbethman" <rbethman at comcast.net>
> To: <amradio at mailman.qth.net>
> Sent: Sunday, November 03, 2013 10:16 AM
> Subject: Re: [AMRadio] AMRadio Digest, Vol 118, Issue 7
> There is a practical reason why the owner of a BC-610 does NOT put it up
> on 160.
> That band, and no other, requires the operator to make modifications to
> the transmitter.
> These modifications MUST be removed prior to operation on any other
> band.  Damage to the TX *will* occur if this is not done. It is a bold
> warning in the manual for the BC-610.
> It is not a simple switch to change to that band.
> I personally understand the hesitation to do this.  The specific parts
> that involved are not easily replaced.
> Bob - N0DGN

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