Thermistor 1A-1 - UK Vintage Radio Repair and Restoration Discussion Forum

sonicm1etn · 8th Oct 2022, 8:23 pm

Evening,
I've been hunting the web but cant seem to find any thermistor 1A-1, or what its value is.

Anyone happen to know what the actual thermistor values / type is? then i can see if I can see if I can get some from Farnell or RS etc

Many Thanks

dagskarlsen · 9th Oct 2022, 7:00 am

Many of us would like to get that information

ms660 · 9th Oct 2022, 11:43 am

According to a post in the link below it's 200k (+-20%) cold and 500 Ohms at 100mW dissipation:

https://groups.google.com/g/uk.d-i-y/c/pqEXU2RQmnA

Lawrence.

pip5678 · 9th Oct 2022, 12:50 pm

I might have a few, PM if interested, Pip

robinshack · 9th Oct 2022, 3:05 pm

I have bag with some in, marked with a BT part number. I remember they were very high resistance at 20C.
Will try and find them and report back.
Not sure if I offered them with my R53, RA53 etc a few months ago. But think all those threads have now gone.
Rob

pip5678 · 9th Oct 2022, 3:49 pm

I found some of my Thermistors 1A-1 - now been sent to eBay since I went to the bother to search them out, so Rob may be a better bet!

sonicm1etn · 9th Oct 2022, 7:02 pm

Thank you for the replies. I'll have a look and see if anything is similar to the one mentioned can be got from electronic suppliers.
I potentially only need one, although I'm beginning to think it is a slight fault with the dial, that causes the bell to tinkle while dialling. none of my others do.

Cheers
Dan

robinshack · 10th Oct 2022, 4:08 pm

Found them, number is 1A, not 1A-1. Whether mine are first issue, non encapsulated. The 420700 is I believe the stores item number.
Pm me with your address and I can post.
Rob

8th Oct 2022, 8:23 pm	#1
sonicm1etn Diode Join Date: May 2018 Location: Friskney, Lincolnshire, UK Posts: 3	Thermistor 1A-1 Evening, I've been hunting the web but cant seem to find any thermistor 1A-1, or what its value is. Anyone happen to know what the actual thermistor values / type is? then i can see if I can see if I can get some from Farnell or RS etc Many Thanks

9th Oct 2022, 7:00 am	#2
dagskarlsen Heptode Join Date: Jan 2008 Location: Hakadal, Norway Posts: 611	Re: Thermistor 1A-1 Many of us would like to get that information

9th Oct 2022, 11:43 am	#3
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 12,678	Re: Thermistor 1A-1 According to a post in the link below it's 200k (+-20%) cold and 500 Ohms at 100mW dissipation: https://groups.google.com/g/uk.d-i-y/c/pqEXU2RQmnA Lawrence.

9th Oct 2022, 12:50 pm	#4
pip5678 Pentode Join Date: Jan 2019 Location: Manchester, UK. Posts: 133	Re: Thermistor 1A-1 I might have a few, PM if interested, Pip

9th Oct 2022, 3:05 pm	#5
robinshack Nonode Join Date: Jun 2010 Location: Spalding, Peterborough, Cambridgeshire, UK. Posts: 2,206	Re: Thermistor 1A-1 I have bag with some in, marked with a BT part number. I remember they were very high resistance at 20C. Will try and find them and report back. Not sure if I offered them with my R53, RA53 etc a few months ago. But think all those threads have now gone. Rob __________________ I am also interested in and collect 00 model railway. My avatar is Bruiser, he has cauliflower ears!

9th Oct 2022, 3:49 pm	#6
pip5678 Pentode Join Date: Jan 2019 Location: Manchester, UK. Posts: 133	Re: Thermistor 1A-1 I found some of my Thermistors 1A-1 - now been sent to eBay since I went to the bother to search them out, so Rob may be a better bet!

9th Oct 2022, 7:02 pm	#7
sonicm1etn Diode Join Date: May 2018 Location: Friskney, Lincolnshire, UK Posts: 3	Re: Thermistor 1A-1 Thank you for the replies. I'll have a look and see if anything is similar to the one mentioned can be got from electronic suppliers. I potentially only need one, although I'm beginning to think it is a slight fault with the dial, that causes the bell to tinkle while dialling. none of my others do. Cheers Dan

10th Oct 2022, 4:08 pm	#8
robinshack Nonode Join Date: Jun 2010 Location: Spalding, Peterborough, Cambridgeshire, UK. Posts: 2,206	Re: Thermistor 1A-1 Found them, number is 1A, not 1A-1. Whether mine are first issue, non encapsulated. The 420700 is I believe the stores item number. Pm me with your address and I can post. Rob Attached Thumbnails __________________ I am also interested in and collect 00 model railway. My avatar is Bruiser, he has cauliflower ears!