[Hallicrafters] HT-40 question

[Tom NØJMY]

Would it possibly be for differential keying?  The correct voltage neon 
lamp can be used for that application, e.g. the Heathkit HG-10 VFO.

73,
Tom NØJMY .   .

Hayseed Hamfest Co. - Multi-section Can Capacitors
for vintage Heathkit, Drake, Halli, Hammy, more...
www.hayseedhamfest.com

RICHARD SOLOMON wrote:
> More likely it is an NE-2 that they used for an el-cheapo VR tube !!
> 
>  
> 
> But, I haven't seen the schematic either.
> 
>  
> 
> 73, Dick, W1KSZ
>  
>> From: james.liles at comcast.net
>> To: hallicrafters at mailman.qth.net
>> Date: Fri, 5 Jun 2009 11:34:18 -0500
>> Subject: [Hallicrafters] HT-40 question
>>
>> Hi Les:
>> If memory serves me correctly --- The later models of the HT-40 had an over 
>> modulation detector on the front panel which was a neon indicator. The 
>> original owner may have added the circuit --- but why under the chassis???
>>
>>
>> Original message:
>>
>> Message: 9
>> Date: Fri, 5 Jun 2009 00:45:00 -0500
>> From: "Leslie Hock" <lhock at comcast.net>
>> Subject: [Hallicrafters] HT-40 question
>> To: <hallicrafters at mailman.qth.net>
>> Message-ID: <20090605054459.0DAB13738B3E at mailman.qth.net>
>> Content-Type: text/plain; charset="US-ASCII"
>>
>> Good evening folks,
>> I have a question about the HT-40. I have just purchased one and
>> the seller wrote me the following:
>>
>> "The transmitter lost power after a few dits and dahs. The tubes all check
>> out 100% and no pooped caps. I traced it to a small neon bulb under the
>> chasis that they use as a regulator. One of the hair-thin leads broke at
>> the bulb. I tryed to solder, but no go. You will see this bulb in the
>> wiring sk and parts list. You would need to replace it. Very small $ item.
>> Prior to that it had a good 45 watts out on cw."
>>
>> I don't have the radio yet but I'd like to get the replacement part as soon
>> as possible.
>>
>> I can't seem to find a parts list for the HT-40. Does anyone have an idea
>> as to what the bulb is that he is referring to? I don't believe it is one of
>> the two LEDs on the front but I just don't know. The HT-40 was my first rig
>> as a teenager and now that I've turned 60, I'm trying to recreate my old
>> station. I don't remember seeing a bulb under the chassis but then I was
>> really looking back then.
>>
>> If anyone has a part number and/or a source for these bulbs, I would really
>> appreciate the information.
>>
>> Thank you,
>> Les Hock
>> WB5JWI
>>
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