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Old 8th Jun 2021, 5:59 pm   #1
Wonkbud
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Default Need help finding info on a Dux radio model.

Anybody here who knows where I can find info on my great grandfather's dux battery radio? It says it's a
type B 22.
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Old 8th Jun 2021, 6:58 pm   #2
AC/HL
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Default Re: Need help finding info on a Dux radio model.

A photo may help, there could be a Philips version.
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Old 9th Jun 2021, 12:07 am   #3
Wonkbud
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Default Re: Need help finding info on a Dux radio model.

OK! So if this works there should be a link to a picture of the radio above!

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Old 9th Jun 2021, 4:04 pm   #4
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Default Dux type B 22. Need help finding what type of voltage is needed.

So i have a Dux type B 22 battery powered radio from 1938 and I need to know what voltage the batteries should have does anybody know?

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Old 9th Jun 2021, 4:12 pm   #5
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Default Re: Need help finding what type of voltage is needed

Any chance of telling us the Valve line up?

In light of no internal pictures and to date no sign of the Dux service data we at least need to know what type of valves it uses for anyone to help.

Cheers

Mike T
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Old 9th Jun 2021, 4:13 pm   #6
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Default Re: Need help finding what type of voltage is needed

The type of valves will tell you, I would think 1938 valves would be 2 volt heaters and 120 volt HT poss grid bias battery. Mick.
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Old 9th Jun 2021, 6:04 pm   #7
Wonkbud
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Default Re: Need help finding info on a Dux radio model.

The valve's are KB2 (325 on the backside), a KFU, KCU1 and lastly a kL4 all tubes are Philips Click image for larger version

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Its a kb2, KFC, KF4, KL4. All tubes are made by philips and i can provide a picture if need be

The valve line up is kb2, kf4, kch1, kl4
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Old 10th Jun 2021, 11:13 am   #8
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Default Re: Need help finding info on a Dux radio model.

KB2 2 Volt heater.
KFC. No info.
KF4 2 Volt heater.
KL4 2 Volt heater.
KCU1 No info.
KFU No info.
KCH1 2 Volt heater.

As for HT I don't know of any HT batteries rated in excess of 120V, but I'm sure someone will correct me if necessary.

The set may also need grid bias supplies. What battery connectors does it have?
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Old 10th Jun 2021, 2:48 pm   #9
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Default Re: Need help finding info on a Dux radio model.

Quote:
Originally Posted by Station X View Post
As for HT I don't know of any HT batteries rated in excess of 120V, but I'm sure someone will correct me if necessary.
There were a few, I'm not sure any were ever very common here but they were available. This page lists some of them, 126, 135, even 166.5V, and each of those included a few extra cells for grid bias.

http://www.blaukatz.com/tables/ht-and-grid-bias/

Paul
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Old 10th Jun 2021, 10:58 pm   #10
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Default Re: Need help finding info on a Dux radio model.

Hi, All of the Philips/Mullard K series valves are 2 volt heaters. In thye Mullard nomenculture A = 4v, E = 6.3V, K - 2v & D = 1.4v
,
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Trevor.

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Old 10th Jun 2021, 11:23 pm   #11
Trifocaltrev
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Default Re: Need help finding info on a Dux radio model.

According to the Radiomuseum, the KL5 replaced the KL4, I am wondering if the set is a clone of the Philips 631B and it has had a KL4 fitted at sometime in it's life?

Regards
Trevor. https://www.radiomuseum.org/r/philips_631b.html

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Old 11th Jun 2021, 4:39 pm   #12
Wonkbud
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Default Re: Need help finding info on a Dux radio model.

I don't know given that not even that not even my grandfather knows anything about it. Though i could check if given instructions on were to look.
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