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Title: Instruction sheet for stancor A-4761 transformer Post by: rsumperl 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 Title: Re: Instruction sheet for stancor A-4761 transformer Post by: N4LTA 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 (http://www.clarisonus.com/Archives/Trans/Stancor61.pdf) Pat N4LTA Title: Re: Instruction sheet for stancor A-4761 transformer Post by: KD3CN 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 Title: Re: Instruction sheet for stancor A-4761 transformer Post by: rsumperl 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 Title: Re: Instruction sheet for stancor A-4761 transformer Post by: N3DRB The Derb 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.
Title: Re: Instruction sheet for stancor A-4761 transformer Post by: DMOD 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 Title: Re: Instruction sheet for stancor A-4761 transformer Post by: Opcom 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..
Title: Re: Instruction sheet for stancor A-4761 transformer Post by: KL7OF on January 25, 2010, 08:12:45 PM Ihave the sheet out in the shack....I will get it later and post the ratios....
Title: Re: Instruction sheet for stancor A-4761 transformer Post by: KL7OF 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 Title: Re: Instruction sheet for stancor A-4761 transformer Post by: rsumperl on January 26, 2010, 05:58:50 AM Thank you everyone for your responses! AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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