[Hallicrafters] HT-30 and SWR meters

Wed Aug 7 21:43:06 EDT 2013

I have tried changing cable lengths but maybe I should try one a bit 
longer?  I had one that was only about 2-2 1/2 ft long and then I put 
one on that was 6 ft. Didnt seem to make much difference. Since we are 
talking about coax, I am using RG-58. Maybe I should change to RG-8 or 
RG-213. Possibly that might be a possible cure?

Bob-W0YBS

On 8/7/2013 7:07 PM, Ron Kolarik wrote:
> 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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