[Hallicrafters] HT-30 and SWR meters

[Robert Sauvan]

I have not checked anything with a counter, but how would an swr meter 
cause oscillating? If that is the case, would that mean I can never use 
an swr meter? The radio works great without an swr meter. No issues of 
self oscillating. But,I am having some issues with 20 meters losing 
power and them pooping out until I turn the band switch back and forth a 
few times. So Im thinking that is caused by a dirty wafer. Im still 
chasing that problem. Dont know if they are related to the swr meter or 
not. Still baffled.

Bob-W0YBS




On 8/7/2013 6:04 PM, Mike Rhodes wrote:
> 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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>
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