This story has a happy ending.
The VFO encoder that I need arrived from Newark but I didn't use it.
Turns out that Ten Tec had the exact replacement part in stock so I
ordered a VFO encoder from them. It showed up yesterday and I installed
it last evening. The new part brought the VFO back to life. After some
performance testing I put the radio on the air this evening and made a
contact with Ray (KB5PX) in Louisiana. Ray gave me a good signal report
despite the dense contesting traffic up and down the 75m band.
I'd say that this radio is good to go and ready to return to the Radio
Museum.
Ripley
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
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________________________________
From: TenTec <tentec-bounces@contesting.com> on behalf of Bob Ripley
<bob_ripley@hotmail.com>
Sent: Thursday, November 9, 2017 10:52:04 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Replacement VFO encoder for TT Jupiter
No sir, I have not tried that.
Ripley
Sent from my iPhone. Errors and all.
On Nov 9, 2017, at 10:41 AM, Fernando
<n2fq@sbcglobal.net<mailto:n2fq@sbcglobal.net>> wrote:
Thank you so much for the update Ripley.
Sounds like you've done an extraordinary amount of troubleshooting.
Kudos to you.
Are you able to use the rig in Pegasus Emulation Mode?
Something of the likes N4PY rig control?
Fernando N2FQ/6
n2fq@sbcglobal.net<mailto:n2fq@sbcglobal.net>
On Nov 8, 2017, at 8:09 PM, Bob Ripley
<bob_ripley@hotmail.com<mailto:bob_ripley@hotmail.com>> wrote:
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<mailto:tentec-bounces@contesting.com>>
on behalf of Fernando <n2fq@sbcglobal.net<mailto: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<mailto:n2fq@sbcglobal.net>
On Nov 8, 2017, at 12:56 PM, Bob Ripley
<bob_ripley@hotmail.com<mailto: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
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