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 Small home brew TRF receiver previously listed in radio identification help.
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 Return to top of page · Post #: 1 · Written at 7:31:35 PM on 22 June 2020.
Jimb's Gravatar
 Location: Kanahooka, NSW
 Member since 18 November 2016
 Member #: 2012
 Postcount: 659

I started repairs on this today. As could be expected it was quite nasty to work on due to it's compact size.
Have recapped it ,have meggered it,and replaced the power lead with one of Carll's nice cotton covered ones and of course I have earthed it. The speaker was in a bad state. I am attempting a repair , I am not very good at speaker repairs due to my condition.
Work still in progress.


 
 Return to top of page · Post #: 2 · Written at 7:37:23 PM on 22 June 2020.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 882

Good stuff!
Keep us informed.
Fred.


 
 Return to top of page · Post #: 3 · Written at 7:03:16 PM on 23 June 2020.
Jimb's Gravatar
 Location: Kanahooka, NSW
 Member since 18 November 2016
 Member #: 2012
 Postcount: 659

Pressed on with this today.
No audio output. In spite of my best efforts the speaker is faulty. It is a little speaker with a 3.5 inch square surround with rounded corners . Have no idea why it is faulty . If I put an analogue ohm meter on ohms X1 across the speaker I can get a crackle out of it. However it does not work. Substituted it with a larger speaker and that worked . I cannot fit this larger speaker it needs the 3.5 inch square speaker. If anyone out there wants to sell me one I would be happy to buy it or swap for another speaker..
The sensitivity is not good however I want to get it back as a complete radio before I progress to the next stage.
Kind regards Jimb.


 
 Return to top of page · Post #: 4 · Written at 7:47:24 PM on 23 June 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1905

Yes Jim I have a couple of NOS ones, they were used in the AWA personal portable. You know, the one that looks like a little bakelite fridge.

I bought them years ago intending to replace the repaired / substitute ones in my little AWAs but never needed to do it. I think I have one of the transformers as well...

Drop me an email!


 
 Return to top of page · Post #: 5 · Written at 9:20:04 PM on 23 June 2020.
Jimb's Gravatar
 Location: Kanahooka, NSW
 Member since 18 November 2016
 Member #: 2012
 Postcount: 659

Thanks Ian will do.


 
 Return to top of page · Post #: 6 · Written at 1:47:38 PM on 25 June 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1905

Yep, found 'em today. I have 3 NOS "kits" of speaker and transformer, branded "Jensen by MSP".
They were a common service item because when the two D cells leaked (as they will if you forget to remove them) the corrosive contents would destroy first the speaker then the transformer.

Jim check you email!


 
 Return to top of page · Post #: 7 · Written at 7:42:19 PM on 25 June 2020.
Jimb's Gravatar
 Location: Kanahooka, NSW
 Member since 18 November 2016
 Member #: 2012
 Postcount: 659

Thanks Ian


 
 Return to top of page · Post #: 8 · Written at 9:56:29 PM on 28 June 2020.
Jimb's Gravatar
 Location: Kanahooka, NSW
 Member since 18 November 2016
 Member #: 2012
 Postcount: 659

Radio now completed and working well. Thanks to Ian who came down with his wife and delivered a new replacement speaker personally. I am very greatful,we had a very pleasant time together over lunch a very enjoyable day.
Thanks again Ian.
Regards Jim.


 
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