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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