[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.

Bob, K4TAX

----- 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 
> appreciated.
> Thanks in advance.   Respond to the list or privately.  Either works for 
> me.
> 73
> Bob, K4TAX
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