[MRCA] [MMRCG] BC-654 project

Sat Jan 18 19:02:03 EST 2025

 I get the idea of making the radio more practical, but then the dial is all jacked up. So you put a tag on it saying something like "add 200Khz to dial setting"?

    On Saturday, January 18, 2025 at 06:11:04 PM EST, MARK DORNEY via MRCA <mrca at mailman.qth.net> wrote:  

 I hear is quite often on 3885 kHz in NY
73Mark D.  WW2RDO

“In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson 
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On Jan 18, 2025, at 1:49 PM, Mark K3MSB <mark.k3msb at gmail.com> wrote:

You're not going to find CW above 3800 unless it's pre-arranged. 
Mark K3MSB 
On Sat, Jan 18, 2025, 12:25 PM MARK DORNEY via MRCA <mrca at mailman.qth.net> wrote:

So you operate where they originally did. Not a problem. I have. 
73
Mark D. WW2RDO

“In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson 
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On Jan 18, 2025, at 10:49 AM, Christopher Bowne <aj1g at sbcglobal.net> wrote:

My name is Chris and I also padded down my BC-654 to operate in the CW band of 80 meters.  IIRC they otherwise didn’t tune below about 3800 kc.
73 de Chris, AJ1G Stonington CT
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On Jan 17, 2025, at 21:50, Ray Fantini via MRCA <mrca at mailman.qth.net> wrote:

I am an Idiot! You don’t take apart the front panel; you just slide the chassis over after releasing the bottom and one side screw!
As far as the chart not working the owner of the radio wants  something  that covers the entire eighty meter band so it's not my call, he intends to use the radio on the air, and I am all for that sort of attitude.
Ray F/KA3EKH
From: MARK DORNEY <mkdorney at aol.com>
Sent: Friday, January 17, 2025 8:07 PM
To: J Mcvey <ac2eu at yahoo.com>
Cc: MMRCG at groups.io <MMRCG at groups.io>; mrca at mailman.qth.net <mrca at mailman.qth.net>; Ray Fantini <RAFANTINI at salisbury.edu>
Subject: Re: [MRCA] [MMRCG] BC-654 project 

CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.

You do know that if you modify the frequency range, the original tuning charts attached to the lid of the radio will be useless. 
73Mark D. WW2RDO

“In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson 
Sent from my iPhone
On Jan 17, 2025, at 5:46 PM, J Mcvey via MRCA <mrca at mailman.qth.net> wrote:

If memory serves me, All you have to do is disconnect the the lug harness on the side , take out a couple of screws, and I think there was a hinge.I don't recall  having to unsolder anything to put it in service mode.

On Friday, January 17, 2025 at 03:40:39 PM EST, Ray Fantini via groups.io <rafantini=salisbury.edu at groups.io> wrote:

Have finally gotten down to working on the two BC-654 transmitter – Receivers that are in the shop. Going to go thru and replace all the capacitors and also modify the range with the excellent K4CHE web page as a guide. Couple questions have come up. 

First,

It appears to me that you have to unsolder the dial light stuff and do a lot of work to remove the receiver chaise in order to have access to the guts? Am I missing something here? Is there an easy method to get to the underside of the receiver?

Second,

Assuming that I will be operating the receiver for a while outside the enclosure, without the transmitter attached. The manual shows some four wafer switch thing along with seeing the board that Mr. Smith built up for doing this but I looked at the stuff that’s out there on line, lot of what I am seeing was not to intuitive, so I drew up this design for a box that will allow you to run the receiver outside of the frame. Please study the attached drawing and feel free to comment.

The plan is to start building this box maybe as soon as this weekend if I can get this access to the underside thing worked out first.

Ray F/KA3EKH

Manual gain control

Bias

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