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Old 29th Apr 2019, 6:47 pm   #1
HamishBoxer
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Default WS19 Mains Supply?

I am awaiting the delivery of what looks like a WS19 set power supply, now this is RCA and a mains one.

Question being was one ever made that was mains for the 19 set? or have I wasted some cash here?

Thank you
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Old 29th Apr 2019, 7:18 pm   #2
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Default Re: WS19 Mains Supply?

There's a third option (in the event there wasn't an original mains supply): is running it off mains of interest? If so, it might be a very good use of cash.
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Old 29th Apr 2019, 7:20 pm   #3
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Default Re: WS19 Mains Supply?

Wireless for the Warrior, Vol 2, WS19 (Cdn) p17 shows a mains unit. 110v.
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Old 29th Apr 2019, 8:54 pm   #4
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Default Re: WS19 Mains Supply?

There was probably a mains unit for base workshops use to allow service and repair.

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Old 29th Apr 2019, 9:14 pm   #5
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Default Re: WS19 Mains Supply?

Thank you all, I will keep you posted when the power supply arrives. It was just over £30, which is not too bad but the postage was £17.50.

Hoping I have done right. Yes,I would like to run it off the mains, at present I have a home brew power supply.
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Old 29th Apr 2019, 10:38 pm   #6
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Default Re: WS19 Mains Supply?

For the second time this week I can't find an item I thought I'd come across David. My recollection was that I had recently seen a photograph of a WS19 Mains Unit [which I can't now locate] I had thought it would be in the thread started by trh01uk "Items for disposal which makes a generous pre-auction offer but apparently not

It would have tended to support Ed Dinning's very experienced comment!
I wonder if I've seen what you've bought somewhere else David?

I think the excellent photos that Richard has provided are an invaluable Forum resource, whether we are seeking to buy the individual items or not!

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Old 29th Apr 2019, 11:26 pm   #7
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Default Re: WS19 Mains Supply?

Dave,

thanks for your encouraging comments about my photos. Interesting that you should see the photos as a forum resource - if such a group area were set up I would be happy to let photos be used to help keep a record of what equipment looks like.

I don't have a mains WS19 psu - though I know an original one exists, as someone else has already mentioned.

They are easy enough to make of course, the only difficulty is probably sourcing the 12-pin socket that's peculiar to the WS19 - though even that depends on how original one wants to be.

Richard
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Old 30th Apr 2019, 6:50 am   #8
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Default Re: WS19 Mains Supply?

Canada did make a mains supply into the early 1950s. I have and still use one for my 19 set. It was made by RCA Victor and dated 1950.

The power supply has a weak point in that the rectifiers can flash over and cause a winding to burn out. At that point it basically becomes a door stop as all windings, transformer and chokes, are encapsulated into one item.

Best check for continuity on windings. Here's the schematic of the psu.
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Old 30th Apr 2019, 8:20 am   #9
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Default Re: WS19 Mains Supply?

Thank you Bruce and all for getting this far. Hope that transformer is OK, if indeed this is the 19 set PSU.

Despite my many years of experience, I like many still need help from our excellent group.
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Old 30th Apr 2019, 9:22 am   #10
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Default Re: WS19 Mains Supply?

Nice example of how to draw a simple circuit for maximum confusion potential!
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Old 30th Apr 2019, 9:36 am   #11
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Default Re: WS19 Mains Supply?

A closer look at original listing shows 230/240AC possibly output and 12 volts input. Starting to think I might have slipped up buying it.
Oh well! We will see I guess, a little too much enthusiasm.
Though, maybe I could get the modern mains PSU in the case.
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Old 30th Apr 2019, 12:20 pm   #12
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Default Re: WS19 Mains Supply?

I believe it is Canadian 19 set supply no 2. Though slightly got at, no voltage selector switch inside (12/24V Input) and a missing rectifier valve.

Wireless For The Warrior Compendium seems to confirm this. Time to find a circuit I think.

Maybe just maybe not too bad a buy??
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Old 1st May 2019, 7:30 pm   #13
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Default Re: WS19 Mains Supply?

This is interesting, I distinctly remember having had an original supply suitable for UK mains, as well as one that used a vibrator or two and one with a dynamotor for battery use.
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Old 1st May 2019, 8:33 pm   #14
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Default Re: WS19 Mains Supply?

I remember:

1] A Canadian-Marconi-company 12V supply that had a vibrator for the receiver HT and a dynamotor for the TX - along with Russian labelling.

2] A British "Mk.3" PSU that had two dynamotors. I bought one of these from A.H.Thacker in Cheslyn Hay just before they closed.

3] Another PSU that was AC-only, 115-230V 50/60Hz.

All these were 'official' military beasts. But then:

4] Various "Mains" supplies - advertised in 1950s/1960s PW, SWM etc, either a RX-only or RX-TX version. Some of these 'unofficial' ones were good, using oil-filled ex-Admiralty transformers etc; some of them were very bad (using over-run domestic-radio/radiogram-style mains transformers struggling to provide the LT to the full 19-set valve complement!)
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Old 1st May 2019, 8:33 pm   #15
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Default Re: WS19 Mains Supply?

I must post pictures as I could be totally wrong yet.Mine has a vibrator and a transformer (not oil filled) rect valve missing and I think it might run on 12/24V DC in.
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Old 2nd May 2019, 6:23 am   #16
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Default Re: WS19 Mains Supply?

If it is the Canadian supply #2 it is 12/24 VDC in. It has a vibrator for receive & dynamotor for xmit. The rectifier is an 0Z4. There was an earlier supply that used 2 smaller dynamotors. The Canadian AC unit is known as "Supply Unit Rectifier #1" and was only 110 VAC in.

I've seen people re-use the cases for a homebrew AC supply.

We wait the outcome.
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Old 2nd May 2019, 9:07 am   #17
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Default Re: WS19 Mains Supply?

It is certainly or was 12/24V in. There is no sign whatever of a dynamotor motor though.The 12/24V switch has been removed.
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