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-   -   Elegant Seven Mk II (R&TV Acton Ltd) (https://www.vintage-radio.net/forum/showthread.php?t=164266)

Herald1360 26th Feb 2020 7:54 pm

Elegant Seven Mk II (R&TV Acton Ltd)
 
Has anyone still got a circuit or even better build instructions for one of these?

I've just pulled the tatty one I bought at Harpenden in 2014 out of storage. Hooked up 9V and after exercising the wavechange switch and volume controls a bit, off it went.

robinshack 27th Feb 2020 10:59 am

Re: Elegant Seven Mk II (R&TV Acton Ltd)
 
Sorry I can't help you Chris.
However, back in the day, my uncle used to buy and make these to order as a small sideline. He really liked the sound and would not make any other model.
From him, that was quite an endorsement.
Rob

dolphin 27th Feb 2020 11:29 am

Re: Elegant Seven Mk II (R&TV Acton Ltd)
 
1 Attachment(s)
Although yours is a Mk II here's the construction information for the Mk I which probably has some similarities. It fell out of a copy of PW! If its any use you're welcome to the original.
Max

davidw 28th Feb 2020 10:38 am

Re: Elegant Seven Mk II (R&TV Acton Ltd)
 
Slightly different diagram here. #3
https://vintage-radio.net/forum/showthread.php?t=78158

Herald1360 29th Feb 2020 12:16 am

Re: Elegant Seven Mk II (R&TV Acton Ltd)
 
1 Attachment(s)
Thanks for those snippets. The circuit for the Mk1 is similar but the other one looks spot on. The main differences circuit wise seem to be an aerial coupling coil in the Mk1 and neutralising components in the other. The neutralising bit seems illogical timescale wise but may have been just down to what cheap devices were available to R&TV. The actual internal layout of the Mk1 is very different too.

Mine has a real ragbag of transistors- a couple of AF117s with snipped screen leads for the mixer and first IF, then a really old looking round ended rectangular thing for the second IF followed by four GEC labelled red ones with odd S7 and the like markings in the AF stages. Someone (possibly R&TV themselves) has added a couple of 4R7 emitter resistors to the output pair. They are small WW types with one end in the PCB and the other connected in mid air to an emitter. I did find a comment somewhere online about output device failure prompting this mod when I was looking for any information.

Just in case anyone wonders about the aluminium angle in the top of the case, it's a bodge I have added to take out an upward bow which was lifting the slot in the top rear away from the flange on the rear panel which should sit in the slot to retain the panel.

Herald1360 29th Feb 2020 12:26 am

Re: Elegant Seven Mk II (R&TV Acton Ltd)
 
Quote:

Originally Posted by robinshack (Post 1220684)
Sorry I can't help you Chris.
However, back in the day, my uncle used to buy and make these to order as a small sideline. He really liked the sound and would not make any other model.
From him, that was quite an endorsement.
Rob

I can relate to that- the cases looked a bit amateurish and the scale plastic was rather flimsy but the set was a good performer of its type back in the day. I suspect the totem pole output removed the worst limitations of a too small output transformer, helping to give a better sound.

My experience with a few other R&TV kits was similar, function rather prevailed over form.


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