Thanks to all. I've been saving this vacuum relay for years. Never thought
too check for proper operation! Always sounded like it was working. It
would appear that I have a good coil and broke relay. What a shame. Thanks
for all the help.
Dennis, w8nw
----- Original Message -----
From: "Alex" <alexeban@gmail.com>
To: "'Dennis A. Homerick'" <DHomerick@neo.rr.com>; "'Dan Hearn'"
<dhearn@air-pipe.com>; "'Amps'" <amps@contesting.com>
Sent: Sunday, June 22, 2008 12:44 AM
Subject: RE: [Amps] {SPAM} Kilovac H-18
> ...from my experience with Kilovac relays:
> 1) They tend to be on the high side as far as current consumption goes:
> 200mA for a 12V DPDT isn't unusual. An SPDT 26.5V coil reads about 635
> Ohms
> and this fits the data sheet.
> It seems that your problem is mechanical in that the coil is activating
> but
> the plunger mechanism inside the vacuum capsule is stuck, or else the
> contacts themselves are welded together. The coupling between the internal
> mechanism and the coil is purely magnetic through the glass so that
> hearing
> a click means only that the coil is activating, not that the contacts
> themselves are moving
> There is a small nut located between the coil pins on the bottom of the
> relay: loosen it and take off the coil. If the relay capsule is OK, the
> contacts should revert to the NC position. And it means the coil section
> is
> magnetized. If they don't you most likely have a stuck, therefore dead
> relay
> since you cannot reach the contacts without breaking the glass.
> I don't know if you'll se the picture I sent you but you van get the data
> sheet on Tyco's electronic components site. And there you can see the
> picture.
> If it's gone, you CAN install a small enclosure on the back side of the
> amplifier and install 2 SPDT relays there. Don't forget that the input
> section can be much smaller than the output one.
> Alex 4Z5KS
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Dennis A. Homerick
> Sent: Sunday, June 22, 2008 2:46 AM
> To: Dan Hearn; Amps
> Subject: Re: [Amps] {SPAM} Kilovac H-18
>
> Dan:
> I tried reversing the current just now and it didn't help. Speaking
> of current (200ma @ 12vdc) seems a bit much for a small relay. I don't
> know
> if a vacuum relay gets the same sealing effect as an open frame relay?
> On the other offer (Bob) of two relays, I'm not sure I have room.
> This
>
> is a medical amp and not much room in RF compartment. Heck, if we don't
> start seeing some sunspots, I may not need a 6m amp. I'll get out my
> winter
> clothing for the next Ice Age?
>
> Dennis, w8nw
> ----- Original Message -----
> From: "Dan Hearn" <dhearn@air-pipe.com>
> To: "Dennis A. Homerick" <DHomerick@neo.rr.com>; "Amps"
> <amps@contesting.com>
> Sent: Saturday, June 21, 2008 12:30 PM
> Subject: RE: {SPAM} [Amps] Kilovac H-18
>
>
>>I have had a similar problem with the vac relay in my 77DX. I cured it by
>> reversing the coil leads. Supposedly the core in the relay becomes
>> permanently magnetized from the DC . This happened to me only once but I
>> installed a reversing switch on the rear chassis just in case it happens
>> again.
>> 73, Dan, N5AR
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
>> Behalf Of Dennis A. Homerick
>> Sent: Saturday, June 21, 2008 8:51 AM
>> To: Amps
>> Subject: {SPAM} [Amps] Kilovac H-18
>>
>> Hello:
>> I have a Kilovac H-18/12VDC DPDT vacuum relay. I've been planning to
>> use
>> in a pair 3-500Z 6m amp. Was testing the relay only too find out that it
>> doesn't make contact with NO contacts. Relay sounds like it is switching,
>> but doesn't show continuity. Any ideas, bad coil, etc.
>>
>> Dennis, w8nw
>> _______________________________________________
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>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>
>
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