[TenTec] Paragon Problem Solving Info Needed
Robert & Linda McGraw K4TAX
RMcGraw at Blomand.Net
Thu Aug 4 09:06:42 EDT 2005
Problem solved. Bad 1N914 diode on the Logic board not allowing ROM access
for the transition from TX to RX.
----- Original Message -----
From: "Robert & Linda McGraw K4TAX" <RMcGraw at Blomand.Net>
To: "Tentec" <tentec at contesting.com>
Sent: Saturday, July 30, 2005 6:43 AM
Subject: [TenTec] Paragon Problem Solving Info Needed
> With all the good technical folks here on the list I take the opportunity
> to get advice on resolving a problem with my old Paragon.
> Symptoms are:
> Receive on all bands and all modes is confirmed as OK.
> Press tune and it appears to switch modes, receiver mutes but after about
> 3 secs, S-meter appears to indicate signals from the input. And there is
> no RF output while in tune regardless of the RF Power setting. Pressing
> tune again does not return the unit to receive. However, pressing LSB or
> USB does switch back to receive or changing the tuning knob will cause it
> to revert back to receive. In transmit, via either PTT or VOX, there is
> no output when audio applied to the mike input however the unit does
> appear to switch into transmit, stays muted, but again after about 3 secs
> the S-meter indicates signals. Again, releasing the PTT does not return
> the unit to receive but pressing the LSB or USB (and maybe other buttons)
> will revert the unit to receive.
> This unit has been sitting on the shelf for some time and has worked
> flawlessly on a regular basis. Power supply is 13.8V and stable.
> Looks like something perhaps on the logic/processor board has gone west.
> I haven't poked around inside thus thought I'd asked in the event someone
> else has experienced the same or like problem. Any suggestions will be
> Thanks in advance. Respond to the list or privately. Either works for
> Bob, K4TAX
> TenTec mailing list
> TenTec at contesting.com
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