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 Post subject: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 6:39 am 
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Joined: Jan Thu 19, 2012 9:35 pm
Posts: 307
Location: Lompoc, CA 93436
Hi,

I just junked out a Gonset communicator that was configured for a 6VDC input and had a vibrator supply. The power transformer looks hefty. Can you feed 6VAC from a high current filament TX into the primary and get the proper HV outputs? Seems a shame to just pitch it.

Thanks,

Corby :shock:


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 10:33 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 11441
Location: Albuquerque, NM 87123
No.


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 11:32 am 
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Joined: Feb Thu 24, 2011 1:29 am
Posts: 2801
Location: Dallas, TX - in the city but with bobcats and coyotes
I expect that you could drive it with a soiled-state mechanism or a vibrator. A 60 Hz sinewave would likely take exception to the primary inductance and you may then have to dance in the smoke.
That's my story, anyway.

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In a triode, no one can hear you screen.


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 3:16 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3243
Location: Cedarville OH USA
No, don't toss it-might be good for a car radio or farm radio repair.

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Yes, it plays. No, there was no FM stereo in 1932. Yes, some people still enjoy AM radio.


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 9:52 pm 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 3939
Location: Powell River BC
I think you could do that, but the configuration would
need you to separate the 6 volt filament circuits from the
DC original DC wiring, and check to see that there are no
6 volt electrolytic filters, DC PTT relays, or even a feed for a carbon
microphone. You may have to arrange a rectifier and filters.

Now the problem is simpler, Your AC input to the vibrator
primary, to avoid the need for a new transformer will work.

Back to vacuum tube CB radio days, it was common to have
a dual voltage input, i.e. 12 Volt for car use, and 120 VAC
for home use. They were called mobile or fixed unit transformers.


This the power unit for the Raytheon TWR-2 which is one of
the first of that ilk that I repaired back then.
Attachment:
Raytheon TWR-2 Fixed or Mobile.JPG
Raytheon TWR-2 Fixed or Mobile.JPG [ 33.13 KiB | Viewed 307 times ]

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de
VE7ASO VE7ZSO
Amateur Radio Literacy Club. May we help you read better.
Steve Dow
ve7aso@rac.ca


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 10:03 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 12206
Location: Somers, CT
Get the manual. Most Gonsetts can be run from 115 VAC directly.
You need the correct wiring for the power connector.

Pete

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A long journey always begins with the words, "I think I know a shortcut."


Last edited by Peter Bertini on Jun Thu 21, 2012 10:05 pm, edited 1 time in total.

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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 10:05 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 6768
Location: Minnesota
It may work but the transformer may overheat at 60 cps. The vibrator put out about 115 cps, they could make the transformers smaller by using a higher frequency.

Dave


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Thu 21, 2012 10:07 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 12206
Location: Somers, CT
GOONEY BIRDS WILL RUN ON DC OR AC!!!!

LOOK AT THE SCHEMATIC FOR THE POWER CONNECTOR WIRING
OPTIONS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Which model do you have?

Pete

_________________
A long journey always begins with the words, "I think I know a shortcut."


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Fri 22, 2012 12:02 am 
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Joined: Jan Thu 19, 2012 9:35 pm
Posts: 307
Location: Lompoc, CA 93436
Pete,

You are correct! :oops:

The schematic from BAMA for the Gonset 2 has 2 pages.

I had only looked at the first page!

Once I scrolled to the 2nd page I saw the 117VAC connections for the transformer!

So in answer to my original question, Yes I could back feed 6VAC, but since it has a winding for a 117VAC input it's a moot point! :D

I'll be saving the TX for future use.

THANKS!

Corby


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Fri 22, 2012 2:21 am 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 3939
Location: Powell River BC
As a moot point you could, if the filaments are powered off the external tranny,
which which would remove that flux load from the dual use transformer, and
leave only the high voltage system drawing from the transformer. Just get
the voltages right across the HV. It would be a light load if you aren't
transmitting.

GOONEY BIRDS --I have one of those upstairs "somewhere".

_________________
de
VE7ASO VE7ZSO
Amateur Radio Literacy Club. May we help you read better.
Steve Dow
ve7aso@rac.ca


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 Post subject: Re: Vibrator supply power transformer question
PostPosted: Jun Fri 22, 2012 12:22 pm 
Member

Joined: Feb Thu 24, 2011 1:29 am
Posts: 2801
Location: Dallas, TX - in the city but with bobcats and coyotes
I stand corrected. I assumed that he was referring to using 6vac at 60Hz into the 6V pulse primary winding.
I loved to hate my old gooney bird.

_________________
In a triode, no one can hear you screen.


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