BT Robin - Answering Machine 202A
Does anyone know what voltage the Plug Top power supply for the BT Robin (Machine ,Answering & Recording No 202A) http://www.britishtelephones.com/ansr202a.htm, introduced in 1985, used?
I've just found one at home (as you do!) but no PSU :( As usual with a lot of BT equipment, there is no mention on any labels on it, of the required voltage. |
Re: BT Robin - Answering Machine 202A
I'll check to see whether the one in my store room has its PSU.
|
Re: BT Robin - Answering Machine 202A
This seems to be a common query: https://www.vintage-radio.net/forum/...d.php?p=737483
|
Re: BT Robin - Answering Machine 202A
And unfortunately, I am unable to assist as my Robin has no power supply either. More importantly, not only is there no indication of voltage but also what the polarity is of the connector - though the latter can presumably be established by dismantling and looking at the circuitry (which I haven't done).
edit: I see that the point about polarity is also discussed in the referenced thread. Perhaps I should have looked there before replying. |
Re: BT Robin - Answering Machine 202A
I remember or think mine was 18Volts.
PS The worst thing on these is dry joints in abundance |
Re: BT Robin - Answering Machine 202A
Were they not ac. Something rings a bell, just look for the absence of a bridge
(or presence) |
Re: BT Robin - Answering Machine 202A
That could be why there aren't any polarity markings?
|
Re: BT Robin - Answering Machine 202A
In that case (AC) there will be a bridge.If I find my psu I will put it up FOC as I certainly dont have that Robin anymore.
|
Re: BT Robin - Answering Machine 202A
Quote:
By the way, if the above-mentioned PSU is found, measurement and publication of its output would be useful before it's rehomed. |
Re: BT Robin - Answering Machine 202A
Will do Dave.
|
Re: BT Robin - Answering Machine 202A
I guess they were concerned that anything but an original PSU might invalidate the BABT approval of the answering machine, so avoided anything (like marking the voltage and polarity) that might encourage users to try substituting their own. Under the right (unlikely, but by no stretch impossible) combination of circumstances, a fault could damage the exchange -- or even other subscribers' equipment.
|
Re: BT Robin - Answering Machine 202A
Good comment Julie.
|
Re: BT Robin - Answering Machine 202A
In this sort of situation, I usually check the polarity and approximate voltage by examining the electrolytic caps. I then start with perhaps 1/3 of their rated voltage, and slowly wind it up until the thing starts to work properly. Add about 20%, and that will usually do.
|
All times are GMT +1. The time now is 9:35 am. |
Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.