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Re: [TenTec] Replacement VFO encoder for TT Jupiter

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Replacement VFO encoder for TT Jupiter
From: Bob Ripley <bob_ripley@hotmail.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 9 Nov 2017 04:09:39 +0000
List-post: <mailto:tentec@contesting.com>
Hello Fernando,



This radio that was donated to us is said to have taken a lighting strike and 
had/has multiple problems.  The persons that worked on it before me fixed the 
power supply protection circuit but when you turned it the transceiver was 
receiving and transmitting at the same time. Not good. They tried a couple of 
things but gave up.



Since joining the staff at the Museum I was asked to look at this radio. After 
a few hours of bench time I isolated the “always transmitting” issue down to 
the ADS micro-controller on the LOGIC/DSP card and replaced that 128 pin 
surface mount beauty with its replacement that arrived in the mail today. The 
new chip fixed that problem but not the VFO issue. Channel B on the encoder is 
fine but channel A is at Vcc level.



I was finally able to see the marking hidden by the ribbon cable and the 
encoder that I need is a HRPG-ASAC#17F made by Avago. This particular encoder 
is a non stock item from about everyone (minimum order 150 units and a 14 week 
delivery). I did find a similar encoder from the same manufacturer at Newark 
Electronics in the UK. This encoder has a cable instead of pins for a front 
mount circuit board application but I believe that I can adapt it for my needs. 
The encoder is about $40.00 and I should receive it in about a week to ten days.



Right now the radio works except for the VFO. 100 watts out on CW, auto antenna 
tuner works, all of the front panel buttons seam to operate correctly and all 
of the other encoders work fine. This evening I found and fixed a problem with 
the PTT line. Turned out to be an open diode on the LOGIC/DSP board but then 
discovered that the ratty Ten Tec hand mic that they gave me to test this radio 
is bad or has a broken wire to the microphone element itself. I will check that 
out tomorrow.



Ripley

KD8UYQ



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10



________________________________
From: TenTec <tentec-bounces@contesting.com> on behalf of Fernando 
<n2fq@sbcglobal.net>
Sent: Wednesday, November 8, 2017 10:15:14 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Replacement VFO encoder for TT Jupiter

Sad news.

One way to find a replacement is to get any info from the one

in the radio.

A search on the parts list yielded this: encoder hrpg

A google search shows than Mouser has one for $32.

A prudent thing to do is to ascertain that is what is written

on the old one before ordering. Less than that I think the

only thing else to do is remove the old one and try to match

its characteristics with what is available.

A long shot would be to contact Ten Tec.

A have two Jupiters here and very interested in how you

fair out. Let us know.

73

Fernando N2FQ/6
n2fq@sbcglobal.net




> On Nov 8, 2017, at 12:56 PM, Bob Ripley <bob_ripley@hotmail.com> wrote:
>
> Hello there.
>
> It looks the VFO encoder on our Jupiter has gone south. Spin the knob all 
> that you want and nothing happens the same is true when the MENU screen is 
> pulled up. Anyone know where I can get a replacement Encoder for this 
> transceiver.
>
> Thank you in advance for your response.
>
> Bob Ripley
> KD8UYQ
> Museum of Radio and Technology
> Huntington, WV
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec

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