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Old 23rd May 2018, 9:01 am   #21
Edward Huggins
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

The ECL86 was not introduced until mid 1962 so that will help the dating.
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Old 23rd May 2018, 12:34 pm   #22
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

Thanks again for all this information, I'm now pretty sure this is mid 60s, and by the sounds of it Ultra electronics continued specialist PA and stuff as well as Aviation from 1961 (in fact I think they used to call this division 'specialist products' or something), so I think this is something from that 'division' (as opposed to say the home market).

I think the connector block at the back is for speakers right? Where would I connect something up (seems a lot of different colours and 5 connectors?!). There is also the mini speaker at the back, which is connected to a knob on the back, which in turn has what looks like speaker cable hanging lose? Does this need going in to the connector block or is it something else?
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Old 23rd May 2018, 1:46 pm   #23
ms660
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

This is just a guess so let's see what else comes in as a suggestion.

Loudspeaker connector block....left to right:

1 & 2....100v Line.
3....8 ohm.
4....4 ohm.
5....Common (for 4 ohm and 8 ohm)

Or something along those lines.

Lawrence.
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Old 23rd May 2018, 5:01 pm   #24
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

Lawrence wouldn't it be.. either an output transformer supplying 100v to all the speakers in the premises on the line, each with an individual small step down output transformer, or a just a standard OPT for one speaker? Can the two functions be combined I'm wondering? Pardon my lack of knowledge here. My son had a night club amp converted and they just put in a regular OPT for 8 ohms!

Paul [in case you are not sure] I'm assuming the Tuner "piggybacks" onto the main amp chassis but is separate otherwise. It has its own mains transformer [right behind the chocolate block connector and the red item]. That's probaly the mains going in via the two black grommets. The tuner feeds its radio signal into the amp and its speaker!

One of the two [Amplifier] transformers on the left will have the mains from the white lead going to it and the other will have wires running to the choc block. You should be able to work out [visually] which one is the mains tranny and which the output transformer going to the choc block to feed the speaker The Grey or Massive one. My money would be on Mr Massive.

You mentioned different leads-what are the colours? [in relation to the connectors!] Is it my eyesight or are there some marking on the choc block?

My first assumption was that the [rather undersized] speaker with it may well have been connected up if someone has used it to test this fairly powerful amp or perhaps more likely, it's just been "hooked up" to listen to the Radio in a workshop which wouldn't require anything better for that purpose-I've done it myself.

Bear in mind it really is all guesswork on my part but following the wiring should help you get an idea We are not sure [yet] if there is a 100v line but that system is an alternative to wiring up extension speakers in a club/factory which just get fainter the more you try to use. Apologies if you know this already but it might be configured that way as Lawrence suggests. Also, if one of the connectors goes directly to the chassis that will just be earth or ground. You get those on Hi Fi amps sometimes.

Dave

Last edited by dave walsh; 23rd May 2018 at 5:23 pm.
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Old 23rd May 2018, 5:37 pm   #25
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

Hello
Just something to throw in to estimate a date for this.

When did the BBC stop using the "light", "third" and "home" designations, as on the tuning scale? Sorry I don't actually know but it pre-dates me!!

Fine looking bit of gear though, hope you can get it sorted out.
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Old 23rd May 2018, 5:45 pm   #26
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

If there are original parts dated 1964, it must be then or later. You can't use parts before they were made, though if they're replacements that doesn't help.
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Old 23rd May 2018, 6:42 pm   #27
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Default Re: Trix Ultra Electronics radio/amp. (Ultra RA 108/2)

The use of 'Light', 'Third' & 'Home' station names would have been phased out in 1967, being replaced by Radios 2, 3, & 4 on VHF(FM). Radio1, which also started on 30 September 1967, didn't have it's own FM network until, IIRC, the 1980s.
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