[TenTec] W T B VFO Module

Sun May 2 10:08:46 EDT 2021

Paul,

Are you having email problems?

Hope all is good with you.

Concerned no replies received to email messages  subject Corsair Arduino external VFO shipped to and received by you early April.

Your response will be appreciated.

73,

Bob GM4CID

________________________________
From: Bob McClements <gm4cid at outlook.com>
Sent: 05 February 2021 19:49
To: tentec at contesting.com <tentec at contesting.com>
Subject: W T B VFO Module

Paul,

I have made a very simple Corsair II external VFO using an encoder, Arduino Nano and a SI5351a DDS board, frequency is displayed on the  Corsair II display.

If the display on your rig is working would you be interested in making one yourself?

73 Bob GM4CID

________________________________
From: TenTec <tentec-bounces+gm4cid=outlook.com at contesting.com> on behalf of tentec-request at contesting.com <tentec-request at contesting.com>
Sent: 05 February 2021 17:00
To: tentec at contesting.com <tentec at contesting.com>
Subject: TenTec Digest, Vol 218, Issue 2

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Today's Topics:

   1. Two topics: Tentec Eagle I2C Clock speed. Multi control
      erratic. (Bob D.)
   2. W T B VFO Module (Paul K)
   3. Re: Two topics: Tentec Eagle I2C Clock speed. Multi control
      erratic. (Bob McGraw)
   4. Encoder (Bob D.)

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Message: 1
Date: Thu, 4 Feb 2021 13:25:06 -0500
From: "Bob D." <ajamas.rn at gmail.com>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: [TenTec] Two topics: Tentec Eagle I2C Clock speed. Multi
        control erratic.
Message-ID:
        <CA+kZa5rz8e5ReKjxZUiOsyCzXfusmasTCSb8vgXP++r2k1P67g at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Thanks guys.
It looks like the control. Resistance bobbles around 10k instead of the
100k it is supposed to be. It's also erratic over the arc of the resistance
portion.

I can't find photo of Bob's fix.

Anything I need to watch out for while removing the front panel?

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Message: 2
Date: Thu, 4 Feb 2021 13:56:30 -0500
From: Paul K <hglent at frii.com>
To: tentec at contesting.com
Subject: [TenTec] W T B VFO Module
Message-ID: <fa720232-35b3-c932-4f59-6cdac4903d86 at frii.com>
Content-Type: text/plain; charset=utf-8; format=flowed

WTB

A VFO Module for a TEN TEC radio.? I have a Corsair II that is fully
operational that is in need of a VFO . Seems like the current VFO has
some broken parts in it that need to be junked.? Broken beyond repair.

If you have a Ten Tec? VFO that needs a new home, I need it desperately.

Please, contact me off list at, HGLENT at FRII.COM?? or?? 970-227-9354

Thanks a million.

73

Paul K.

WA0BAG

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Message: 3
Date: Thu, 4 Feb 2021 14:10:37 -0600
From: Bob McGraw <rmcgraw at blomand.net>
To: tentec at contesting.com, ajamas.rn at gmail.com
Subject: Re: [TenTec] Two topics: Tentec Eagle I2C Clock speed. Multi
        control erratic.
Message-ID: <bc1407d0-fcbb-f4d2-57df-b069ef64fb67 at blomand.net>
Content-Type: text/plain; charset=utf-8; format=flowed

Oh the Contesting . com site won't allow pictures.? Something about
files being too big.

And the ones I referenced are on the Tentec Eagle site on Groups.IO.

73

Bob, K4TAX

On 2/4/2021 1:58 PM, Bob McGraw wrote:
> Interesting evaluation, although I believe incorrect.
>
> The MULTI encoder is a segmented step switch with gold plated contacts
> inside.?? It is not a resistive element.
>
> See the attached pictures.?? This is the one I removed from my radio,
> opened it, cleaned the contacts, re-assembled it and installed it back
> into my radio some years back.?? It is still working today.?? And my
> radio is older than any one else's radio as it is an Engineering model
> used for beta testing.? This was before the first one was ever sold.
>
> 73
>
> Bob, K4TAX
>
> On 2/4/2021 12:25 PM, Bob D. wrote:
>> Thanks guys.
>> It looks like the control. Resistance bobbles around 10k instead of the
>> 100k it is supposed to be. It's also erratic over the arc of the
>> resistance
>> portion.
>>
>> I can't find photo of Bob's fix.
>>
>> Anything I need to watch out for while removing the front panel?
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
>
>

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Message: 4
Date: Thu, 4 Feb 2021 21:45:47 -0500
From: "Bob D." <ajamas.rn at gmail.com>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: [TenTec] Encoder
Message-ID:
        <CA+kZa5rN1Mj9VSSj4iZkqMSoAtN9EsPSkmgjX=gyC34gJd58dg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Thanks everyone!

Got it working. I replaced the encoder with a new one. Took the old one
apart and there were tracks of something following the path of the wipers.
I'll clean it up and use it for another project.

There was something that looked like chemical residue on the motherboard.
It' looked like it came in at the encoder and then run doen the pins of the
CPU and SPU sockets. I cleaned all that up too.  I took pictures and will
try to post to the groups.io for Eagle. It had the encoder problem from the
day I picked it up from the original owner. I finally got tired of it.

Tools etc.
0.050" hex key for knobs.
Phillips screwdriver.
Soldering iron.
small diagonal cutters.
needle nose pliers or forceps
magnifying glass
good light
Q-tips
91% isopropyl alcohol
solder
solder sucker
solder wick
liquid flux

parts:
new encoder
0.1" spacing pin terminals like the ones used to connect to the board.
only need 3 pins worth.

The microphone connector unplugs from the mother board.
The front panel ground connector is soldered.
unplug and unsolder before taking the panel off.

Buttons lay in the front panel for easy alignment when putting the panel
back.
I was expecting individual buttons. No. They're all embedded in a sheet of
foam!

The encoder knob does not have a set screw. The others do.

73, -bob ah7i

--
-do not look into LASER with remaining eye!

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