The AM Forum
April 18, 2024, 05:54:25 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: HT-37 Modulator driver transformers?  (Read 1549 times)
0 Members and 1 Guest are viewing this topic.
KU8L
Member

Offline Offline

Posts: 64


« on: October 02, 2020, 12:27:56 PM »

Hi guys...I know the HT-37 can be used quite nicely for AM so will try this here.

Have a KP4 friend trying to get one back up and going but both mod driver interstage transformers are bad.  He was going to get some standard audio output units to try but I thought that would not end well.

I am thinking these should be small interstage river transformers like the one in the mod driver of a Elema AF-67/68.

They take the plate output of the audio out driver and couple it to the balanced modulators.

Anyone have any experience rplacing these with a generic driver trans?  I thought Hammond has one usable in the elmac and that might be worth a try. 

Thanks

Curt
Logged
DMOD
AC0OB - A Place where Thermionic Emitters Rule!
Contributing
Member
*
Offline Offline

Posts: 1770


« Reply #1 on: October 06, 2020, 12:58:11 PM »

You might want to upload the HT-37 schematic and tell us what transformers you are referring to.

The HT-37 is not a plate modulated system, but uses a phasing system.


DMOD
Logged

Charlie Eppes: Dad would be so happy if we married a doctor.
Don Eppes: Yeah, well, Dad would be happy if I married someone with a pulse.NUMB3RS   Smiley
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 0.052 seconds with 18 queries.