[SignalOne] Who works on CX7s?

Mon, 14 Jan 2002 23:05:23 -0800

Dave,
Thanks for the information on the hum problem. The hum is also getting into
the audio and make it sound garbled. Would that be consistent with a bad Q4?
How hard it is to change this regulator?
Charlie
----- Original Message -----
From: David Bertman <[email protected]>
To: <[email protected]>
Sent: Monday, January 14, 2002 2:14 PM
Subject: Re: [SignalOne] Who works on CX7s?


>
> Sounds like a great radio.  Loud hum can be caused by a failed voltage
> regulator, eg Q4
> which is mounted on the rear of the radio.
>
> Dave AB7B
>
>
>
>
>                     "Charles Hugg"
>                     <[email protected]       To:     "Signal/One"
<[email protected]>
>                     et>                         cc:
>                     Sent by:                    Subject:     [SignalOne]
Who works on CX7s?
>                     signalone-admin@mailm
>                     an.qth.net
>
>
>                     01/14/2002 10:03 AM
>                     Please respond to
>                     signalone
>
>
>
>
>
> I have acquired a Signal/One. It is a  really nice CX7 that has been
> converted to a CX7B, I think. The Front Panel label says CX7 and the SN is
> #256. But it has the Signal/One CX7B Power Supply board installed and it
> has
> the Signal/One LED Readout installed. Both of these units have Signal/One
> CX7B 1974 labels. It also has the Tube Screen Fuse installed on the back
> and
> a meter light installed above the S meter. I didn't get much paper work
> with
> this one. There is an  Info Sheet in the manual outlining the mods on CX7s
> to make it them CX7As and there is a similar sheet from Signal/One
covering
> the mods to convert CX7s and CX7As  to CX7Bs, but I don't know if all of
> this work has been done on this radio.
> It seems to work. I plugged it in and turned it on. No smoke. I heard some
> strong signals on 20 meters(good S-Meter readings), but there was what
> sounded like an AC hum on the audio. It was a pretty loud hum, so I turned
> the radio off. I think that it has set up for quite awhile. It probably
> needs some caps replaced.  This transceiver is one of the cleanest radios
> that I have seen. I looks almost new, especially on the inside.
> The boards are shinny and have not been abused at all.. There is not
really
> much dust collected on the chassis.
> I think that it might really be a keeper. It even has the amber and green
> in
> the readout like the CX11A.
> Does anyone know of someone who will work on these radios? I could take it
> too
> them within Texas or surrounding States.
> Thanks, Charlie Hugg. K5MBX
>
>
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