[time-nuts] Tbolt not talking

Chuck Harris cfharris at erols.com
Wed Jul 22 21:08:24 UTC 2009


You guys are aware, I hope, that the original power supply had totally gonzo
color codes... right?

They used the same colors as a computer power supply, but black was +5V (IIRC).

If you hooked a voltmeter common lead to the black power supply lead, you would
read a totally goofy set of readings when you measured the other leads.

-Chuck Harris

bjones0 at mindspring.com wrote:
> I had a similar problem with mine (from the "TAPR Group Buy").. it would appear to power up & show a (almost) 10Mhz
> output, but the serial port was dead..  After much testing it ended up the power supply had gone bad...I was getting
> the correct voltage difference between the 12v legs but each leg (+/- 12v's & 5v) were off.  Once I hooked up a new
> supply (built from a computer power supply) it works like a champ.
> 
> -Hrian
> 
> -----Original Message-----
>> From: John Green <wpxs472 at gmail.com> Sent: Jul 22, 2009 11:02 AM To: time-nuts at febo.com Subject: [time-nuts] Tbolt
>> not talking
>> 
>> I got one of the Chinese Tbolts off eBay and when I powered it up and ran Tboltmon, I got nothing. I checked the
>> com port and it is correct. I am using a USB to serial converter but I don't believe that is what the problem is
>> since I have used it to program some Motorola radios that have a reputation for being picky about their serial
>> connections. I will try a standard serial port but are there other things I should look at? I did look at the
>> manual but didn't see anything that might help. This is my first experience with Tbolts. I already have a Z3801 and
>> recall having some problems getting it to talk. Any help appreciated. 
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> 
> 
> 
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