Just an update on the HD-73 issue.
The lamp is OK, and there was no voltage at the meter. [an ohm meter across
the meter measured a value, and the power from the DVM sent it to about half
scale :-) ]
So, I pulled the little circuit board and started checking voltages. It looks
like the tiny little 4.7V zener is bad.
Good news: Simple fix and a cheap part.
Bad news: I will have to order the zener, so no chance of repairing before the
contest this weekend :-(
73 all and thanks for the tips,
Dan
--
K9ZF
Amateur Radio Emergency Service, Clark County Indiana. EM78el
former K9ZF /R no budget Rover ***QRP-l #1269
Check out the Rover Resource Page at:
<http://www.qsl.net/n9rla>
List Administrator for: InHam+grid-loc+ham-books
Ask me how to join the Indiana Ham Mailing list!
>________________________________
> From: Richard Karlquist <richard@karlquist.com>
>To: towertalk@contesting.com
>Sent: Wednesday, September 11, 2013 11:21 PM
>Subject: Re: [TowerTalk] HD-73 Rotator issues
>
>
>On 2013-09-11 18:17, Dan Evans wrote:
>> Talk'ians,
>>
>> Just picked up an Alliance HD-73 at a hamfest. The previous owner
>> sold it really cheap, because it has a problem...
>>
>
>A famous gotcha with this is that if the lamp is burned out,
>the meter circuit doesn't work either. The symptom will be
>as you described, the meter never moves from the left peg.
>BTW, replacements for the legacy lamp are still available
>from distributors.
>
>If the lamp lights up, check are see if there is voltage
>on the meter. If there is, the meter is bad. I have an
>extra meter if you need it, but there are two versions.
>
>If not, one of the handful of other components is bad.
>It is easy to troubleshoot from the schematic. There
>is no rocket science involved.
>
>Rick N6RK
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|