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Data sheet for Stancor A-4765 line driver transformer?




 
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Author Topic: Data sheet for Stancor A-4765 line driver transformer?  (Read 259 times)
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N0WEK
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« on: March 11, 2017, 02:41:17 AM »

I've got a Stancor A-4765 line driver transformer and have the catalog listings and ratings but not the data sheet with the hook-up and terminal identifications.

Does somebody have a copy? I've searched Google and all the other data bases but no joy and a search here didn't turn it up either.

Thanks,

Greg
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N0WEK
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« Reply #1 on: March 12, 2017, 06:26:42 PM »

Nobody has the hook-up sheet or connections for this one?

Greg
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KA2DZT
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« Reply #2 on: March 12, 2017, 09:08:53 PM »

Nobody has the hook-up sheet or connections for this one?

Greg

Don't think Stancor ever had hook-up sheets for the small xfmrs.  I'll take a look in my Stancor catalogs to see if they gave any additional info.  I'll get back later tonight.

How many leads or connection terminals does this xfmr have??  Anymore than five or maybe six??

Generally, a driver xfmr is rated in ratios of the primary to 1/2 the secondary.  If yours is a line driver than we know the primary would be 600 ohms or maybe 500 ohms.  From that you can figure out everything else.

Stancor A-4765 ratings are;  

Primary imp. 500 ohms,  15 watts,  200Hz-4000Hz  RMS Test Voltage 1000

Turns ratios are  1.33, 1.2, 1, .8, .7, .5, .45, .4, .36, .32 to 1.  Primary to 1/2 secondary.  Numbers greater than 1 are a step down ratio from the primary (500 ohms) to 1/2 secondary.

If the terminals are not labeled you'll have to determine which terminals are what.  Do this by applying a low AC voltage (10v-20v) on the primary and then measure the voltage on the secondary terminals.  The voltages will be higher or lower based on the ratios.  The ratio of 1:1 you should measure the same voltage applied to the primary on 1/2 the secondary (each half) (measured from the CT to each terminal that are the 1:1 ratio).

To find the impedance on each half secondary,  divide 500 by the square of the turns ratio.

Fred
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N0WEK
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« Reply #3 on: March 13, 2017, 03:38:05 AM »

This thing has 10 color coded wires PLUS a terminal board with 14 terminals. There usually was a spec and hook-up sheet in the box with the transformers. This one didn't come with one when I got it but it's a popular transformer in the Poly-pedence line and somebody should have the specs.

Usually these things have instructions for jumpers and connections to get to the values you want.

Greg
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KA2DZT
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« Reply #4 on: March 13, 2017, 09:21:55 AM »

Looks like you're going to need the data sheet.  Didn't know the thing has 10 leads and 14 terminals.  I have a lot of info on xfmrs, don't remember ever seeing any data sheets for this driver.

Hopefully someone has the data sheet.

Fred

Searching the web, the only thing I came up with is that Stancor called these sheets "instruction sheet" rather than data sheet.
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KL7OF
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« Reply #5 on: March 13, 2017, 01:24:04 PM »

I found this...Yours may be similar....

* scan0001.pdf (1233.99 KB - downloaded 23 times.)
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N0WEK
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« Reply #6 on: March 13, 2017, 03:02:03 PM »

I found this...Yours may be similar....

That should give me a clue as to what's going on in there. I printed it out to keep with the transformer. If nothing else turns up I should be able to sort it out from that.

Hopefully the data sheet for this one shows up.

Thanks!

Greg
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KB2WIG
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« Reply #7 on: March 13, 2017, 04:55:29 PM »



Not much, but here it goes...

http://www.bunkerofdoom.com/xfm/Stancor_1954_S_654/s_654_0013.jpg


Maybee Pat will have somthin' else.

klc
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