Marconi 1041C - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Sinewave · 1st Feb 2020, 11:18 am

I'll have to make a decision about which way to go. On the drawings they show some as potentiometers, some as variable resistors

The front panel of my 1041C has the following values fitted in the following positions, yet the schematic has the values stated in red

RV1 - 100K 100K
RV7 - 1K 1K
RV3 - 1K 33K
RV2 - 330R 10K
RV6 - 2K 1K
RV5 - 2K 3.3K
RV4 - 330R 6.8K

As you can see, there are some differences. Do you recall seeing different values fitted?

I have wondered if this is because of any revisions to later units? Or has someone in the past fit different values in?

I'm unaware of a drawing set which serves from this serial number to that serial number with another drawing set for the later serial numbers.

Skywave · 1st Feb 2020, 1:09 pm

Quote:

Originally Posted by Sinewave

As you can see, there are some differences. Do you recall seeing different values fitted?

No: I can't say that I did - or didn't - sorry. That's a level of detail that has vanished from my memory & I have no notes, etc. of the TF1041.

What you might have there is a TF1041 that is halfway between the B and the C model: mine was like that. Ultimately, you might have to resort to the 'suck it and see' approach.

Al.

Sinewave · 1st Feb 2020, 6:04 pm

Quote:

Originally Posted by Skywave

Quote:

Originally Posted by Sinewave

As you can see, there are some differences. Do you recall seeing different values fitted?

No: I can't say that I did - or didn't - sorry. That's a level of detail that has vanished from my memory & I have no notes, etc. of the TF1041.

What you might have there is a TF1041 that is halfway between the B and the C model: mine was like that. Ultimately, you might have to resort to the 'suck it and see' approach.

Al.

Yep, I may have the transitioning version, as the later ones had a different format for the serial number.

What I'll do then, as the circuit is largely the same otherwise is order the fitted values and the drawing values and see what happens.

Sinewave · 6th Jul 2020, 11:39 am

Just looking to return to this after the 'lab' has been redecorated and new shelving fitted, now everything is in tidy order!

So, does anyone know of some modern equivalent way of hashing up the Marconi T connector? The type TM5031A. It doesn't look impossible to make....

1st Feb 2020, 11:18 am	#21
Sinewave Octode Join Date: May 2016 Location: Oxfordshire/Bucks borders, UK. Posts: 1,604	Re: Marconi 1041C I'll have to make a decision about which way to go. On the drawings they show some as potentiometers, some as variable resistors The front panel of my 1041C has the following values fitted in the following positions, yet the schematic has the values stated in red RV1 - 100K 100K RV7 - 1K 1K RV3 - 1K 33K RV2 - 330R 10K RV6 - 2K 1K RV5 - 2K 3.3K RV4 - 330R 6.8K As you can see, there are some differences. Do you recall seeing different values fitted? I have wondered if this is because of any revisions to later units? Or has someone in the past fit different values in? I'm unaware of a drawing set which serves from this serial number to that serial number with another drawing set for the later serial numbers. __________________ Avometer, vintage Fluke and Marconi collector. Also interested in vintage Yaesu and KW.

6th Jul 2020, 11:39 am	#24
Sinewave Octode Join Date: May 2016 Location: Oxfordshire/Bucks borders, UK. Posts: 1,604	Re: Marconi 1041C Just looking to return to this after the 'lab' has been redecorated and new shelving fitted, now everything is in tidy order! So, does anyone know of some modern equivalent way of hashing up the Marconi T connector? The type TM5031A. It doesn't look impossible to make.... __________________ Avometer, vintage Fluke and Marconi collector. Also interested in vintage Yaesu and KW.