[Hallicrafters] HT-30 and SWR meters

[Mike Rhodes]

Have you checked the output frequency with a counter when it magically 
goes key down? Wonder if it might be 'flying' or self oscillating which 
would certainly bypass the keying circuitry.

Mike / W8DN

**************

On 8/6/2013 9:28 PM, Rsauvan wrote:
> Thanks for the info Roger,
> But, I have tried all of the suggestions you through at me. It shows 
> output on any band in any mode. I have swapped cables. It does it with 
> any of the swr meters I have. Almost acts as if they are shorting 
> something and putting the thing into transmit. I will have to put the 
> rig apart and look at the coax connector to see if I think anything 
> looks weird. Will let you know.
>
> Thanks-Bob
>
>
> On 8/6/2013 6:22 PM, Roger Shultz wrote:
>> Hi Bob,
>>
>> It is baffling to say the least! Do you see power output on the HT-30 
>> meter
>> after adjusting the calibrate control and the carrier level control 
>> in CW
>> position? Does it show output on the HT-30 meter with modulation in DSB.
>> LSB, or USB?
>>
>> Connecting a meter to the output can't key the transmitter unless in 
>> some
>> way it causes the PA to oscillate. Can you try it in 80,40 and 20 
>> meters to
>> see if it acts the same on each band? Can you try a different coax cable
>> between the transmitter and the meter? Are you trying this into a 
>> dummy load
>> and if not what is the load?
>>
>> I recall that this HT-30 was badly abused so I'd look really 
>> carefully to
>> see if something between the antenna connector and the rest of the 
>> circuitry
>> looks out of place.
>>
>> Are all the power meters the same? Can you borrow a totally different 
>> one
>> from somebody to try?
>>
>> All of these are just guesses and though I have the manual, I just 
>> don't see
>> a common link between the RF output circuit and the Standby switch.
>>
>> 73, Roger, NJ2R
>>
>> -----Original Message-----
>> From: hallicrafters-bounces at mailman.qth.net
>> [mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Robert 
>> Sauvan
>> Sent: Monday, August 05, 2013 10:43 PM
>> To: Hallicrafters
>> Subject: [Hallicrafters] HT-30 and SWR meters
>>
>> Hi all,
>> I am a bit baffled trying to get swr meters to work with my newly
>> restored HT-30 transmitter. I have 4 which I have swapped and tried with
>> the unit. The radio works fine when I dont have a meter in line. But,
>> anytime I hook one up inline, the transmitter goes into transmit when I
>> turn the dial from "warm up" to "standby". All of the meters work fine
>> with all of my other transmitters. A Viking Ranger and a Hammarlund
>> HX-50. All of the swr meters are the Radio Shack/Micronta style. Anybody
>> have any idea what might be going on? Not that I really need one but it
>> is nice to see the power output and the swr in case it changes for some
>> reason.
>>
>> Thanks-Bob-W0YBS
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>
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