Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Special Projects

Forum home - Go back to Special Projects

 Using the SC Micromite generator on a TRF
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 2:47:28 PM on 13 October 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Here we go, I put the Micromite into a plastic box and put it to work.

Naturally i'm using it not for the main intended purpose as an IF alinement device, but, to look at the response of the coil set in the TRF receiver I will get around to finishing one of these days.

The MM does exactly what it says it does, provides a sweep signal between 2 set points, or, a single signal with the option of modulation. When I drive the TRF set you can SEE visually (I know) the effect of twiddling coil cores, gang trimmers and the strange things the AGC loop can do to the tuned circuits, however I did not go into that aspect in this essay.

Cheers, Fred.

Micromite TRF


 
 Return to top of page · Post #: 2 · Written at 10:54:32 PM on 13 October 2017.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5501

Document uploaded.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 8:06:36 AM on 14 October 2017.
Redxm's avatar
 Location: Tamworth, NSW
 Member since 6 April 2012
 Member #: 1126
 Postcount: 434

Another excellent article Fred
I built one of those SC alignment boxes too. Havent had a chance to use it on a radio yet.

Ben


 
 Return to top of page · Post #: 4 · Written at 12:12:02 PM on 14 October 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Hi Ben, looks like a very handy bit of kit and saves me trying to make my valve wobulator work at RF signal frequency.
How it works is a bit beyond me being firmly stuck in valve technology.
Maybe someone with a bit more talent could figure out a way of looping the general sweep output through the internal display as it does when in the IF test mode. Probably some programming thing but that's way beyond me. Odd that the designer did not do this anyway or maybe he did and I cant see it?
I cant be bothered asking SC and getting a non answer.
Fred.


 
 Return to top of page · Post #: 5 · Written at 2:23:07 AM on 19 October 2019.
Wa2ise's avatar
 Location: Oradell, US
 Member since 2 April 2010
 Member #: 643
 Postcount: 724

Looks like a useful device, I'd like to get one. Hopefully I could order one over the internet, so I'd need a link to it. Google didn't have a clue...


 
« Back · 1 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.