Unusual ITT item: what is it? - UK Vintage Radio Repair and Restoration Discussion Forum

Skywave · 9th Oct 2021, 2:50 pm

Yes, as per photo.

It is clearly a polarized item: 100s of k-ohms in one direction, a few k-ohms in the other. I suspect that it is a 12-v. Zener diode, but if so, what is its power rating? And what is the meaning of the 'U5-35R' ?

All replies will be appreciated; thanks.

Al. / Oct. 9th.

ms660 · 9th Oct 2021, 3:00 pm

According to a current Ebay listing I'm looking at it's a sounder/buzzer:

http://www.farnell.com/datasheets/40909.pdf

https://worldradiohistory.com/hd2/ID...e%20sounder%22

Lawrence.

Skywave · 10th Oct 2021, 12:25 pm

Lawrence: thank you.

It's a buzzer - of course it is - as I have just proved by connecting it to 12 v.d.c. I really don't know why I made the totally ridiculous suggestion that it might be a Zener diode!

Now searching for replacement brain cells in my Raaco component storage racks!

Al.

ms660 · 10th Oct 2021, 12:27 pm

No problem.

Lawrence.

Skywave · 10th Oct 2021, 4:59 pm

Hi Lawrence,
Yes, I did find a drawer which I don't think I've ever noticed before, but when I looked inside it there was a small note that stated "Oh, do come on! You didn't really think that you'd find brain cells in here, did you?"

Al.

ms660 · 10th Oct 2021, 5:05 pm

Context....

Lawrence.

9th Oct 2021, 2:50 pm	#1
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Unusual ITT item: what is it? Yes, as per photo. It is clearly a polarized item: 100s of k-ohms in one direction, a few k-ohms in the other. I suspect that it is a 12-v. Zener diode, but if so, what is its power rating? And what is the meaning of the 'U5-35R' ? All replies will be appreciated; thanks. Al. / Oct. 9th. Attached Thumbnails

9th Oct 2021, 3:00 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Unusual ITT item: what is it? According to a current Ebay listing I'm looking at it's a sounder/buzzer: http://www.farnell.com/datasheets/40909.pdf https://worldradiohistory.com/hd2/ID...e%20sounder%22 Lawrence. Last edited by ms660; 9th Oct 2021 at 3:18 pm. Reason: link added

10th Oct 2021, 12:25 pm	#3
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: Unusual ITT item: what is it? Lawrence: thank you. It's a buzzer - of course it is - as I have just proved by connecting it to 12 v.d.c. I really don't know why I made the totally ridiculous suggestion that it might be a Zener diode! Now searching for replacement brain cells in my Raaco component storage racks! Al.

10th Oct 2021, 12:27 pm	#4
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Unusual ITT item: what is it? No problem. Lawrence.

10th Oct 2021, 4:59 pm	#5
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: Unusual ITT item: what is it? Hi Lawrence, Yes, I did find a drawer which I don't think I've ever noticed before, but when I looked inside it there was a small note that stated "Oh, do come on! You didn't really think that you'd find brain cells in here, did you?" Al.

10th Oct 2021, 5:05 pm	#6
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Unusual ITT item: what is it? Context.... Lawrence.