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Decca DM45.

 
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Re: Decca DM45.

Post by nuvistor » Sat Jun 18, 2016 1:25 pm

They definitely were not X/Y types that I referred to, for that matter was there X and Y types in the 70's?

Frank

 
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Re: Decca DM45.

Post by Refugee » Sat Jun 18, 2016 1:53 pm

The duff ones I found are certainly X/Y types.
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Re: Decca DM45.

Post by Derren » Sat Jun 18, 2016 4:52 pm

Have now got the set home and am delighted with it, thanks Till. I know your camera is not working so I will take some pics, not sure how to resize them to the right size for the forum, if I can't manage it I will email them to you and maybe you could manage to post them. Thanks again.

 
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Re: Decca DM45.

Post by TVJON74 » Sat Jun 18, 2016 5:17 pm

Hi Derren,

Have a look here for posting pictures and file size.
viewtopic.php?f=45&t=10351

 
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Re: Decca DM45.

Post by nuvistor » Sat Jun 18, 2016 6:21 pm

Refugee wrote:The duff ones I found are certainly X/Y types.


I have not seen those before, the ones I used were red, blue or yellow.

Frank

 
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Re: Decca DM45.

Post by Katie Bush » Sat Jun 18, 2016 10:30 pm

TVJON74 wrote:Hi Derren,

Have a look here for posting pictures and file size.
viewtopic.php?f=45&t=10351


Also worth downloading, if you don't already have one, is an image resizer.. My personal favourite is this;

https://imageresizer.codeplex.com/

Of course, there are others.

Marion

 
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Re: Decca DM45.

Post by Refugee » Sun Jun 19, 2016 1:09 pm

nuvistor wrote:
Refugee wrote:The duff ones I found are certainly X/Y types.


I have not seen those before, the ones I used were red, blue or yellow.

Frank


The brightly coloured ones are constructed very differently to the ones I found and also they use a different dielectric.

 
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Re: Decca DM45.

Post by Derren » Sun Jun 19, 2016 8:48 pm

Things were starting to get a bit more stylish towards the end of the 50s :)
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Re: Decca DM45.

Post by Till Eulenspiegel » Sun Jun 19, 2016 9:45 pm

Hi Derren,
The Decca is looking good on it's tripod stand. The TV-stereo radiogram version was the model 666. The TV chassis was modified to incorporate an additional audio amplifier for the record player, the chassis has two PCL82 triode-
pentodes.
The 666 has the same styling cues as the DM45.

Till Eulenspiegel.
Attachments
TGRG666.jpg

 
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Re: Decca DM45.

Post by Derren » Sun Jun 19, 2016 9:54 pm

Yes it's looking good and thanks for your efforts. The sound is surprisingly good too much better than average! Of course one could argue the cabinet is larger than it needs to be and it doesn't need two speakers, but it's all part of the style I suppose and it does seem to enhance the sound somehow. Will try and add a suitable image with a picture at some point.

 
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Re: Decca DM45.

Post by Till Eulenspiegel » Sun Jun 19, 2016 10:38 pm

The sound quality of the FM radio is excellent. One design eccentricity is the switch over to FM is not instantaneous, the CRT is switched out the heater chain and the FM ratio detector double-diode is switched in. The EB91 takes a surprisingly long time to warm up. On FM the heaters of the timebase and vision valve heaters are switched out and replaced by a 440 ohm resistor.
Of course after changing over to television from FM results in another wait until the TV valves warm up again.
1960s viewers were quite happy to tolerate these minor inconveniences.

Till Eulenspiegel.

 
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Re: Decca DM45.

Post by Katie Bush » Sun Jun 19, 2016 10:43 pm

Do you know what? - There's another one of these for sale on the usual site... :qq1

 
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Re: Decca DM45.

Post by Derren » Mon Jun 20, 2016 2:07 pm

Yes I see that now, there's also a Decca 131 but it's been on for a while and as usual they're asking too much. Funny isn't it, when my Dynatron TV27 was being restored with commentary on here, one suddenly appeared on there too, yet I assumed I'd never see another! Makes you wonder who is watching/following us perhaps :)

 
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Re: Decca DM45.

Post by Derren » Sat Jul 02, 2016 3:14 pm

PICT0862.JPG
An unexpected update! The set performed very well indeed for about a week :) Then there was only intermittent powering up of the line output which sometimes could be corrected by turning the tuner switch around. (don't ask me why - vibration??) Eventually the line whistle was totally absent so I started to panic slightly. Took it over to Till's workshop this morning, after some investigation it turned out to be a failed PL81 so all is now cured. A good quality Telefunken valve the original one, so I did wonder if installing a new type of LOPT might have put extra stress on the line output valve, but I was assured this would not be the case. Also shown a component removed from the set dating from the 1970s showing that the set has indeed had a long service life. You certainly wouldn't know that from the picture tube which is in stunning condition! Thanks to Herr Eulenspiegel for the fault finding and the new part.

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