Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Instruction sheet for stancor A-4761 transformer




 
The AM Forum
May 26, 2019, 07:36:31 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Instruction sheet for stancor A-4761 transformer  (Read 4177 times)
0 Members and 1 Guest are viewing this topic.
rsumperl
Guest
« on: January 25, 2010, 01:20:49 PM »

Greeting everyone,
 Does anyone have an instruction sheet on the Stancor A-4761 driver transformer? I searched the Internet and didn't come up with anything.

Thanks,
 Ray
Logged
N4LTA
Contributing
Member
*
Offline Offline

Posts: 743


« Reply #1 on: January 25, 2010, 03:12:13 PM »

Here is the Stancor  catalog  for 1960 -1961 - its on page 9

http://www.clarisonus.com/Archives/Trans/Stancor61.pdf


Pat
N4LTA
Logged
KD3CN
Contributing
Member
*
Offline Offline

Posts: 135


« Reply #2 on: January 25, 2010, 03:14:13 PM »



Yup,

It was also on page 9 in 1959:

http://www.pmillett.com/file_downloads/stancor_1959.pdf
Logged
rsumperl
Guest
« Reply #3 on: January 25, 2010, 03:22:52 PM »

I took a look at the catalog, it doesn't tell me which taps are which. The side of the transformer has some rows of terminals that are numbered and that's it. Nothing telling me if I go here I'll get this ratio.


Thanks,
 Ray
Logged
N3DRB The Derb
Guest
« Reply #4 on: January 25, 2010, 06:47:42 PM »

you'll have to pump some ac voltage into it and figure out the ratios that way. I have 2 Merit transformers here, nice ones, one's a 50 watt class mod transformer and ones a 30 watt driver unit that would be perfect for a quad o 2A3's. just numbered rows o terminals. you cant find connection info on them, so you just have to figger it out yourself.
Logged
DMOD
AC0OB - A Place where Thermionic Emitters Rule!
Contributing
Member
*
Offline Offline

Posts: 1283


« Reply #5 on: January 25, 2010, 07:09:05 PM »

You may have find a primary or secondary winding with an ohmeter and then place 6 VAC from a LV transformer across that winding.

An audio generator would be better but the above works well for most situations.

Phil - AC0OB
Logged

"What kind of Koolaid do they make you drink in the Physics Department?" Charlie Epps to Dr. Larry Fleinhardt, NUMB3RS   Smiley
Opcom
Patrick J. / KD5OEI
Contributing
Member
*
Offline Offline

Posts: 7161



WWW
« Reply #6 on: January 25, 2010, 07:33:03 PM »

I checked and I do not have the sheet either. I noticed on the AM Window site, there are sheets for modulation iron, but none or few for drivers. We may regret that..
Logged

Radio Candelstein - Flagship Station of the NRK Radio Network.
KL7OF
Member

Offline Offline

Posts: 2087



« Reply #7 on: January 25, 2010, 08:12:45 PM »

Ihave the sheet out in the shack....I will get it later and post the ratios....
Logged
KL7OF
Member

Offline Offline

Posts: 2087



« Reply #8 on: January 25, 2010, 08:28:34 PM »

This is for Stancor A-4761 and A-4762   The ratio is primary to 1/2 secondary  A-4761 Primary 150 ma.  Sec 100ma.
Terminal #1.......2.6
Terminal #2.......3.0
Terminal#3........3.2
Terminal#4........3.4
Terminal#5........4.0
Terminal#6.........4.7
Terminal#7.........5.0
The 2 lowest center terminals Labeled "L"are connected to the leads that come thru the grommet holes as yellow leads... they have no connections within the transformer.
To use the transformer connect the green leads to the tube grids and the yellow leads coming thru the grommet to the bias supply or ground...connect lugs "L"to the desired ratio...

These transformers are built with two separate secondaries so that each class B tube may have a different bias voltage applied if so desired...

I use these transformers in several speech amps...Good luck   Steve
 
Logged
rsumperl
Guest
« Reply #9 on: January 26, 2010, 05:58:50 AM »

Thank you everyone for your responses!

Ray
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.06 seconds with 19 queries.