[time-nuts] TBolt help...

J. L. Trantham jltran at att.net
Mon Jun 19 22:12:14 EDT 2017

I had a T-Bolt 'failure' when my -12V supply died.

I am aware of another event on the list when the solder connection at the -12V connector to the t-Bolt failed.

Make sure the -12V is reaching the PCB for the T-Bolt.

Hope this helps.


-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Tom Van Baak
Sent: Monday, June 19, 2017 3:42 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] TBolt help...

Hi Dave,

There was one other report of something similar over the past ten years. I did not look into it.

Since your TBolt was part of the group buy, I'll send you a new one. Contact me off-list. But can you double check the -12 V power supply voltage for me? Anything between -7 and -15 is probably ok. But if it fails it will affect the serial port. Also, if you have time, open the box and use a 'scope on both the input (TTL) and output (RS232) of the serial transceiver.


----- Original Message ----- 
From: "Dave Mallery" <dave.mallery at gmail.com>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Monday, June 19, 2017 1:16 PM
Subject: [time-nuts] TBolt help...

> hi
> My Tbolt has been running for a long time, since the final group buy.
> It is still running (indicated by the 10MHz output) but there is no data
> coming out the serial port. LH says so and so does my lil TSIP monitor, as
> well as my rs-232 cable monitor/breakout devices.  I have tested all the
> cables involved.
> If this has happened to you, were you able to isolate it further?  is it
> fixable?
> many thanks in advance!
> dave mallery
> -- 
> Dave Mallery, K5EN                 (ubuntu linux 16-10)
> PO Box 15                              Ophir,  OR  97464
>      linux counter #64628 (since 1997)

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