[Hallicrafters] SX-117 disaster

[Richard Knoppow]

    Well, the cap is easy enough to check, a VOM will tell you if its 
shorted and depending on the value may give you a kick if its OK.  My 
guess is that its OK.

On 7/31/2016 7:44 PM, K9FFK wrote:
> Jeff:
>
> C4 is also a suspect. Its a 300V mica.
>
> If it is shorted, AVC goes to ground through L5 along with V1's
> bias...red plates.
>
> If it is open, no signal. V1 is normal. Receiver is deaf.
>
> Dick, K9FFK
>
>
> On 7/31/2016 7:26 PM, Jeff wrote:
>> Thanks to all the fast responses.  I've drowned my grief a bit, and I
>> did some disassembly.  The Antenna coil surely does look like it got
>> toasted.  I've included an image on my webserver:
>>
>>
>> http://www.podengo.com/sx117/L5.jpg
>>
>>
>> In looking at it, it looks as if the coil form actually deformed
>> (inside) so that the slug won't move past a certain point.  I don't
>> see any damage to rotary switches or other components.  The 6DC6s test
>> OK, but I don't have any replacements in my stock to try a different one.
>>
>> Anyone have any advice on the coil (or a spare you can part with?)
>>
>>
>> Jeff
>>
>>
>>
>> On 7/31/2016 3:05 PM, Jeff wrote:
>>> Looking for some advice or consolation...
>>>
>>> Previously well working SX-117/HT-44 twins.  I hadn't run them in a
>>> long time, and many cables got messed with in the mean time.
>>> Unfortunately, in my haste to hook the pair back up again, I got the
>>> transmitter output fed into the receiver antenna input...  and then
>>> hit transmit to tune up the transmitter...
>>>
>>> It's taken me a while to stop cursing about it, but now my SX-117 is
>>> deaf as a post.  A quick check of the RF amp and 1st mixer show that
>>> the tubes are OK.  A signal generator on 14.250 is barely audible,
>>> but I can no longer get a good strong peak on the preselector.  I can
>>> get a bit more of a peak on 40 meters, but it's still quite deaf.  I
>>> had the rigs in 20 meters when the mishap occurred.
>>>
>>> It's just about acting like there's no antenna at all hooked to it.
>>> I get no increase in noise whether or not it's hooked to the antenna
>>> or dummy load.
>>>
>>>
>>> I've had the courage to admit I've done something heroically stupid
>>> -- so I'm reaching out to the list for any thoughts or guidance as to
>>> how to fix this.
>>>
>>>
>>> Jeff
>>>
>>>
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>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL