Bush DAC90.

[Northyorks1]

Hello everyone,

This is my first post, and I would like some help in identifying a capacitor in a Bush DAC90. I have looked at a few DAC90 chassis and have not seen this capacitor. It is a green 50 ohm capacitor, connected to pin 4 on valve EBC33 and to same point as capacitor 24. Is it a mod or there for a specific reason, and can it be removed. I am a complete novice regarding vintage radios, but have recently become a little obsessed with learning more about these beautiful radios. Any help would be very much appreciated. I Have attached a couple of photos.

Thanks.

[Cobaltblue]

Hi Northyyorks welcome to the forum that's a 50 Ohm Resistor.

I wonder if its actually connected to pin 7 (or possibly 2) and is a shunt for the dial light?

On an unmodified set if the dial light fails the set ceases to work.

Cheers

Mike T

[Northyorks1]

Thanks for reply Mike, at least I now know that it is a resistor. Knowledge gained already. Counting down clockwise its connected to the fourth pin, whether that is pin four I dont know due to limited knowledge.

[Nuvistor]

If you haven’t seen this web page it is a worth while study before you start, lots of good information and advice.
https://www.vintage-radio.com/repair...ion/index.html

[Northyorks1]

Thanks for link Frank,will have a look.

[Cobaltblue]

Originally Posted by Northyorks1

Thanks for reply Mike, at least I now know that it is a resistor. Knowledge gained already. Counting down clockwise its connected to the fourth pin, whether that is pin four I dont know due to limited knowledge.

Nuvistors Link is an excelent place to start if you don't have much experience.

The valves on this set have octal bases there is a locating bump on the cental locator on the valve base.

From below either side of this bump is pins 1 and 8 from below the pins are numbered clockwise.

Bear in mind the tags are laid over from the pins.

Cheers

Mike T

[Northyorks1]

It looks like the resistor is connected to pin 2, as previously suggested by yourself.

Thanks Ian.

[Cobaltblue]

Hi Ian

So it looks as if its a modification to prevent a dial light failure from preventing the set from working.

We can move on

Do the sets filaments light?

Is there any noise in the speaker ?

Cheers

Mike T

[Northyorks1]

Hello Mike,

I have not attempted to start radio yet due to numerous corroded and damaged wires, which I am in the process of replacing. one of the valves was broken, and the dial lamp holder is badly rusted with the bulb seized in it. and the mains dropper housing is damaged. And these are just the visual faults. So as a starter radio for a novice its not just a simple replacement of capacitors, wish I had been that lucky. And parts are hard to find apart from valves. So it will probably be a while before its started up time permitting. I will post again when I get to that stage. Would you recommend leaving the resistor in place. Thanks very much for your advice and patience with a newbie.

Cheers Ian.

[Cobaltblue]

I agree a DAC90 is not an ideal first restoration especially if it has mechanical issues.

If the resistor is, as appears accross the dial light I would probably leave it in situ.

Keep us up to date with your progress.

Cheers

Mike T

[Nuvistor]

An easy first radio repair is the Ekco U332 or its Ferranti version. Plenty of room in the set, well laid out chassis and B9A valves.
There are others just as well laid out but the U332 is one I know, it’s a live chassis set, but the DAC90 is as well.
Something to look out for if you get the bug for fixing these items.

[Northyorks1]

Thanks Mike and Frank. Hopefully it's not too long before its ready to start up. And yes I have got the bug. Just a lot of learning to do, but with knowledgeable people like yourselves to point me in the right direction I think I will do OK.

Cheers Ian.

[Silicon]

I was wondering, does the Bush DAC90 contain Asbestos around the dropper resistor?

[Silicon]

After looking at your second photo and others on the internet, I think it is highly likely that there is white Asbestos lining the box which houses the main dropper resistor.

[Northyorks1]

As far as I know it is white asbestos, but poeple on here are far more informed than me and could confirm this. but I handle as though it is white asbestos, very carefully. Added another picture of mains dropper on above mentioned radio.