Author Topic: A unique 1977 GPO Trimphone  (Read 3730 times)

Offline Duffy

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A unique 1977 GPO Trimphone
« on: August 31, 2017, 05:14:41 PM »
I picked up this unique 10 button 1977 GPO Trimphone at an antique and consignment store today.
I even tested it and it works. It has a different sound to it when it rings. They call it warbling.

https://en.wikipedia.org/wiki/Trimphone

Offline Pourme

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Re: A unique 1977 GPO Trimphone
« Reply #1 on: August 31, 2017, 05:18:15 PM »
I saw some of those for the 1st time on a web site I ran across, yesterday. Very unique phone. Nice addition to any collection!

Expensive?
Benny

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Offline TelePlay

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Re: A unique 1977 GPO Trimphone
« Reply #2 on: August 31, 2017, 05:48:33 PM »
Nice find.

There are a lot of topics on the forum about these. If you do a search for "GPO Trimphone" you will get 51 hits, some of which are about the Trimphone.

Online twocvbloke

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Re: A unique 1977 GPO Trimphone
« Reply #3 on: August 31, 2017, 05:52:15 PM »
A Trimphone's ringer is quite a unique sound, I'm not sure if anyone else used the same method to make a phone ring, as I've only ever heard it on a Trimphone... :)

An example of a Trimphone ringing for those who haven't heard one:
https://www.youtube.com/watch?v=stg9zMxj8zQ

Offline Pourme

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Re: A unique 1977 GPO Trimphone
« Reply #4 on: August 31, 2017, 07:50:37 PM »


It has a different sound to it when it rings. They call it warbling.

https://en.wikipedia.org/wiki/Trimphone

Kinda similar to a Ericofon....
Benny

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Offline Duffy

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Re: A unique 1977 GPO Trimphone
« Reply #5 on: August 31, 2017, 08:05:22 PM »
Here I go again! Has word prototype has darken my doorstep again. While looking for information on this phone tonight, I came across this.

http://www.ebay.ie/itm/Extremely-Rare-Prototype-1977-Silver-Jubilee-Trimphone-These-Were-Never-Issued-/182740421095

I find this hard to believe.

Offline Pourme

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Re: A unique 1977 GPO Trimphone
« Reply #6 on: August 31, 2017, 09:02:50 PM »
Benny

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Offline Duffy

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Re: A unique 1977 GPO Trimphone
« Reply #7 on: August 31, 2017, 09:06:46 PM »
I found this: http://www.museumoftechnology.org.uk/objects/_expand.php?key=1212
Still looking.

Thanks Benny,

It's sounding good, but I don't think it's a prototype.

Offline Pourme

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Re: A unique 1977 GPO Trimphone
« Reply #8 on: August 31, 2017, 09:17:07 PM »
From what I can find, it was a limited edition.
Benny

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Online Owain

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Re: A unique 1977 GPO Trimphone
« Reply #9 on: September 01, 2017, 05:58:07 AM »
Possibly an STC Deltaphone limited edition, rather than a GPO Trimphone one.

Offline Duffy

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Re: A unique 1977 GPO Trimphone
« Reply #10 on: September 01, 2017, 06:42:19 AM »
Possibly an STC Deltaphone limited edition, rather than a GPO Trimphone one.

From the research I have been doing it is a 1977 special version of the Trimphone. The Deltaphone came out in 1980 and was a leather covered Trimphone.
Here are a couple of links I got some of the information from.

http://www.retrowow.co.uk/telephones/trimphone/trimphone_range.php
http://www.britishtelephones.com/tsr1016.htm


Online Owain

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Re: A unique 1977 GPO Trimphone
« Reply #11 on: September 01, 2017, 01:02:43 PM »
The GPO Deltaphone was leather-clad.

But STC always used Deltaphone as their in-house name for Trimphone when marketing to telephone administrations.
http://www.lightstraw.co.uk/ate/tao/trimphones/deltaads1.html

http://collections.vam.ac.uk/item/O372034/stc-deltaphone-gpo-trimphone-telephone-rowlands-martyn/


Offline Duffy

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Re: A unique 1977 GPO Trimphone
« Reply #12 on: September 01, 2017, 02:13:39 PM »
The GPO Deltaphone was leather-clad.

But STC always used Deltaphone as their in-house name for Trimphone when marketing to telephone administrations.
http://www.lightstraw.co.uk/ate/tao/trimphones/deltaads1.html

http://collections.vam.ac.uk/item/O372034/stc-deltaphone-gpo-trimphone-telephone-rowlands-martyn/

Good info, thanks Owain.

Online Owain

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Re: A unique 1977 GPO Trimphone
« Reply #13 on: September 02, 2017, 04:36:42 AM »
I think Swedish Ericsson also made a Silver Jubilee commemorative phone, a silver version of the Diavox (GPO Astrofon) but that wasn't issued to the public either.

These limited editions were probably restricted to manufacturer's samples to show manufacturing capabilities, or gifts for valued customers or senior managers.

Offline ThePillenwerfer

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Re: A unique 1977 GPO Trimphone
« Reply #14 on: September 02, 2017, 08:52:18 AM »
It would be interesting if anybody turns up a schematic for the Tone Ringer 8A.  The GPO published a diagram for the earlier Tone Ringer 5A (Diagram N692) but I've never seen one for the 8A.