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Old 22nd Jun 2020, 11:10 pm   #5
Pellseinydd
Heptode
 
Join Date: Jul 2007
Location: Flintshire, UK.
Posts: 707
Default Re: GPO Watch Receiver Identification?

Quote:
Originally Posted by Voxophone View Post
Thanks both for your replies.

I can confirm that the watch receiver did come with a hook for use with the 300 series. I believe it is the 'X' type.

Interestingly, the resistance of the watch receiver coils measures at around 40 Ohms, rather than the 150 Ohms mentioned on the link above; however, it does work fine when connected up to the telephone line. I might try disconnecting it from the 300 series to make sure there are no parallel components influencing the result.

Kind regards,

Liam
Forgot to mention there are pictures of the hooks for the pyramid and 300 type phones on Bob's website
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