[TowerTalk] Hy-Gain HDR300 Rotator - Brake Release Solenoid

[Patrick Greenlee]

Tiny wire... Encapsulated...  Oh well. Glad you got some good news from 
other sources.

I remember many decades ago using a tungsten filament light bulb to heat 
the potting material on an old TV horizontal flyback Xfmr so I could 
unwind it to get the fine wire which was so fine it had a thread running 
with it to provide strength. Wrapped a paper towel tube with the wire, 
one layer, close wound, varnished it. Made secondary for an air core 
transformer to make a small batt op Tesla coil.  Mad Scientist from an 
early age but not mad anymore just slightly upset. ;) ;)

Patrick        NJ5G


On 5/22/2017 1:52 PM, Bryan Swadener via TowerTalk wrote:
> Thanks Patrick,
> However, the solenoid coil is encapsulated. I've rewound stuff before but, this is tiny (about 3/4" diameter x 1" long). At 32 Ohms DCR, that's REALLY tiny wire that I don't have. I have since identified four possible solenoids from Guardian Electric that *may* retrofit. And then, a TT person has offered to supply the OE solenoid. Thanks Doug!
> And in all this, Craig (Rotor Doc) has been most helpful with historical information about the HDR300.
> tnx es vy 73, Bryan WA7PRC
>        From: Patrick Greenlee
>   To: Bryan WA7PRC
>   Sent: Monday, May 22, 2017 11:33 AM
>   Subject: Re: [TowerTalk] Hy-Gain HDR300 Rotator - Brake Release Solenoid
>     
> Maybe a PITA but perhaps you could unwind the coil while counting turns
> and rewind after fixing any breaks in the wire or use new wire.
>
> Patrick NJ5G
>
> On 5/21/2017 8:15 PM, Bryan WA7PRC via TowerTalk wrote:
>> Yes. Craig (Rotor Doc) says he doesn't have any and Hy-Gain doesn't stock much, and the rotator was a modified farm implement unit (NOT manufactured by Hy-Gain).
>>
>> I'm open to other suggestions... manufacturer & pn or even just the manufacturer. I have four part numbers for a Guardian solenoid that MAY work. Are there any others?
>>    
>> tnx es vy 73,
>> Bryan WA7PRC
>>   From: Dwight N2FMC
>>    To: Bryan WA7PRC
>>    Sent: Sunday, May 21, 2017 5:42 PM
>>    Subject: Re: [TowerTalk] Hy-Gain HDR300 Rotator - Brake Release Solenoid
>>      
>> Have you checked with Norms Rotor repair or Rotor Dr.?
>>
>> Dwight
>>
>>> On May 21, 2017, at 20:26, Bryan WA7PRC wrote: >
>>> Hi Folks,
>>>    
>>> My olde Hy-Gain HDR300 rotator's brake release solenoid has gone open.
>>> It appears the OE replacement is not readily available. I'd defeat the DOA
>>> solenoid but, I'd rather not leave my big F12 yagi to pinwheel in the wind.
>>> I have identified a /possible/ workaround using an off-the-shelf part from
>>> Guardian. My question: does anyone have a recommendation for an OE
>>> or exact-replacement part?
>>>    
>>> tnx es vy 73,
>>> Bryan WA7PRC
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