[Hallicrafters] HT-30 and SWR meters

Wed Aug 7 21:07:01 EDT 2013

Try changing the length of the cable between the HT-30 and
the SWR meter even if it's only a few feet long. 

Ron
K0IDT

----- Original Message ----- 
From: "Robert Sauvan" <rsauvan at beyondbb.com>
To: "Mike Rhodes" <w8dn at roadrunner.com>
Cc: "'Hallicrafters'" <hallicrafters at mailman.qth.net>
Sent: Wednesday, August 07, 2013 7:24 PM
Subject: Re: [Hallicrafters] HT-30 and SWR meters

>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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> 
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> 
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