[Collins] 32V2 relay issues

Tue Jun 9 19:02:19 EDT 2009

Springs, lever friction and contact spacings and cleanliness are important 
too.  Lots of stuff I fix here has old relays
that need cleaning and adjusting.
The way I would approach this one is remove the relay from the rig and run 
it up with a magnifying glass and bright light.  This is assuming that the 
power to the relay is correct when it's wired to the radio.
The worst one for me was an NCX 5 I did years ago.  National turned the 
multi-function relay on during receive and off in transmit.  That caused the 
relay poles to bend like leaves of grass, killing off the relay function. 
Precision re-aligment fixed the relay and saved the radio.
Good luck
Greg
WA7LYO
Kinston NC
----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: "Al Parker" <anchor at ec.rr.com>; <wf2u at ws19ops.com>; 
<collins at mailman.qth.net>
Sent: Tuesday, June 09, 2009 2:30 PM
Subject: Re: [Collins] 32V2 relay issues


> What Al mentions happens quite often and sometimes it can be cured. If not
> there are 2 choices. Treat it as an AC relay and find a voltage it is 
> happy
> with. Or if the DC comes from a rectifer try boosting the voltage thru a 
> SS
> diode and big cap or a doubler reduced to where it works.
>
> Noy knowing the internals of the rig I dont know if those are options.
>
> Ive had several 24VDC relays fail the same way that were used on the tower
> to select combinations of the stacked yagis. They were also unused for
> several years on the shelf when I reconfigured the antennas. I suspect the
> RF had something to do with it or maybe close lightning strikes. They work
> fine now on AC.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Al Parker" <anchor at ec.rr.com>
> To: <wf2u at ws19ops.com>; <collins at mailman.qth.net>
> Sent: Tuesday, June 09, 2009 1:07 PM
> Subject: Re: [Collins] 32V2 relay issues
>
>
>> Hi Meir,
>>    Maybe it's a long shot, but try reversing the connections to the coil.
>> Maybe the armature has become magnetised & is "back biasing" the field.
>>    Hope it's something simple like that.
>> 73,
>> Al, W8UT
>> New Bern, NC
>> www.boatanchors.org
>> www.hammarlund.info
>>
>> "there is nothing -absolutely nothing- half as much worth doing as simply
>> messing about in boats."
>>   Ratty, to Mole
>>
>>
>> ----- Original Message ----- 
>> From: <wf2u at ws19ops.com>
>> To: <collins at mailman.qth.net>
>> Sent: Tuesday, June 09, 2009 12:39 PM
>> Subject: [Collins] 32V2 relay issues
>>
>>
>>> Folks,
>>>
>>> I have a weird problem with my "newly reactivated" 32V2 transmitter.
>>> I acquired the 32V2 about 10 years ago, and only last week I took it
>>> down from the "projects" shelf, to clean it and bring it back to
>>> operational status.
>>> After cleaning the layers of dust off the chassis, tubes, etc., and
>>> applying contact cleaner on the bandswitch and other switches, I did
>>> the almost obligatory conversion to solid-state rectifiers while
>>> disconnecting the HV paths from the transformer filament windings. All
>>> voltages are normal, the transmitter works perfectly - except... The
>>> relay is not pulling in all the way, no matter how I adjust it. A
>>> little motion is evident, but it doesn't pull in all the way. The
>>> voltage on it is within the ballpark (around 50 V, the coil is a 48
>>> VDC coil according to the specs, and measures 2 Kohm)the coil is not
>>> hot. If I bring the armature too close to the coil core, the NC
>>> contacts open, so this is not an option. If I hold the armature
>>> closed, the transmitter works fine as the HV kicks in. Sometimes, but
>>> rarely, the relay stays closed after the manual help. There is no
>>> mechanical binding (although the contacts springiness feels stiff, but
>>> I can't compare it with a working unit), I even put a dab of lubricant
>>> on the hinge/shaft of the armature.
>>> The problem somewhat stumps me, because nothing seems to be wrong...
>>> I used the transmitter on the air last weekend, with great reports,
>>> but it's a two-hand operation, having to use the push-to-talk switch
>>> and with the other hand push the relay with a long insulated
>>> screwdriver.
>>> Anyone had similar experience? Possible cure short of trying to find a
>>> new relay?
>>>
>>> Thanks in advance for any ideas.
>>>
>>> 73, Meir WF2U
>>> Landrum, SC
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