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 Healing 401A Data and Pictures
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 Return to top of page · Post #: 1 · Written at 10:33:57 PM on 22 July 2016.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Hi All

Just picked up an example of the Healing 401A and it has been modified by someone in the past. Does anyone out there have the service data for that set and some detailed photos of the Vibrator Unit and associated transformer and caps.

The set I have has a replacement Speaker, Mains Transformer, Unknown rectifier

I am yet to pull the chassis out so unsure what that will hold for me... Got told it works Smile

See how that pans out!

Healing 401A Table Radio
Healing 401A Table Radio


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Valve radios, They just don't make them like they used to

 
 Return to top of page · Post #: 2 · Written at 11:05:57 PM on 22 July 2016.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5300

I have sent the schematic and notes to your email address.

Some photos on this site: http://www.philipstorr.id.au/radio/thirteen/collection.htm

The owner of that site is in Nairne. He may be able to help you with information.

His contact details are here: http://www.philipstorr.id.au/


 
 Return to top of page · Post #: 3 · Written at 5:59:26 PM on 23 July 2016.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Hmm... I will chase down Phil and see if he has any other information.


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Valve radios, They just don't make them like they used to

 
 Return to top of page · Post #: 4 · Written at 4:37:03 PM on 24 July 2016.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Oh Bugger

I Extracted the chassis today in between doing the house reno and found a nasty surprise. There is a diode bridge, bunch of random caps, 3 terminal Voltage reg and Transistor......

Looking for a donor chassis or parts now to make something original out of this.

Photos are on there way Sad


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Valve radios, They just don't make them like they used to

 
 Return to top of page · Post #: 5 · Written at 5:56:57 PM on 24 July 2016.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1094

Sounds like someone added a "battery eliminator"..


 
 Return to top of page · Post #: 6 · Written at 6:34:17 PM on 24 July 2016.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Just noticed staring into the abyss that is the chassis, there is a M-2840 transformer that has been pressed into service at the O/P Transformer..... That gives me a impedance of roughly 5660K
(240/9)=26.6
Sq=707.56
8 x 711.12889 = ~5.660K

Thats too low for a 1L5G (15K)

Might just put this on the shelf for a while until a donor chassis is found......


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Valve radios, They just don't make them like they used to

 
 Return to top of page · Post #: 7 · Written at 9:59:32 PM on 24 July 2016.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5562

Photos uploaded.

When it looks like a radio has been modified to the hilt it is time to start from scratch with it I reckon. Marc has lots of horror stories coming from similar situations.

Another oddity is Healing's oddball model naming convention. This radio is indeed a 401A, obviously modified to run from the mains. However, Healing's tiny 401E is a four valve mantel receiver. I now have seven of them in different colours. I wonder why Healing gave a similar model number to two vastly different radios.


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A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 8 · Written at 7:40:10 AM on 26 July 2016.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1050

Another oddity is Healing's oddball model naming convention.

Actually the Healing model designation system is quite descriptive:

The first figure indicates the number of valves used (4 = 4 valve set)

The second & third/fourth figure not quite sure, but probably cabinet style, material etc.

The last letter is most important as it describes how the set is powered, with the exception of radiograms & transistor sets:

A - Vibrator.

B - Battery.

C - AC/DC.

D - 32V.

E - AC.

G - Gram/Radiogram.

H - Battery/AC.

T - Transistor.

TG - Transistor Gram/Radiogram.


 
 Return to top of page · Post #: 9 · Written at 9:20:40 AM on 26 July 2016.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 3786

I had a converted vibrator Healing in here recently, wonderful half a job on the caps. That chain of Ecaps looks a lot like a voltage tripler (perhaps more).

If it uses the same valves as the one I had what might look like a T03 Transistor, could be a regulator for the filaments and they will have a rectifier.

There might be something like LR8 controlling a TIP55 for the "B" voltage. I have used that regulator on some vintage battery sets and in a reformer. Max input around 450VDC it will regulate down to 5V.

One of the local servicemen often used small mains transformers for speaker transformers.

You may be better to get the circuit & analyse what has been done first.


 
 Return to top of page · Post #: 10 · Written at 12:40:36 PM on 26 July 2016.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Hi Guys

Thanks for all that good information. I never thought of those caps as being a voltage tripler. I have shelved it for a few weeks because I have to go O/S for a Work trip.

I have located (Emailed to me) a diagram for this set and there seems to be alot of changes. All the old vibrator parts are missing and so it at least one of the Filter Chokes. This is evident by what is no there and the Photos on Phil's Site referenced above.

All the valves are correct with the output being suspect as the markings have been rubbed off. Its a Philips Valve and has the usual number on the Bakelite Octal Base that I will use to do a reference check to find the type.


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Valve radios, They just don't make them like they used to

 
 Return to top of page · Post #: 11 · Written at 11:15:57 AM on 3 May 2017.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Well Its about time for an update.

I was at a local HRSASA auction on the weekend and picked up another whole radio. It is a VIbrator Model that is almost original. The only thing wrong it it is missing its dial glass.

I might consider using the new chassis in my case.....

Dan


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Valve radios, They just don't make them like they used to

 
 Return to top of page · Post #: 12 · Written at 2:44:59 PM on 3 May 2017.
Clive Durham's Gravatar
 Location: Grenfell, NSW
 Member since 8 July 2015
 Member #: 1771
 Postcount: 212

I could be interested in the chassis and valves from your modified unit as the 401 I was given had the chassis stripped and a transistor radio put in side. (used in shearing shed)

Please email me if interested.


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Clive

 
 Return to top of page · Post #: 13 · Written at 2:56:46 PM on 3 May 2017.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1305

Pity, it looks a neat enough job for a vibrator conversion. Looks to me like whoever did it knew what he was doing.

Mismatch of output transformer shouldn't matter too much, max output will probably be down by 6dB and be accompanied by a slight increase in distortion. Certainly shouldn't stop it working.


 
 Return to top of page · Post #: 14 · Written at 8:22:47 PM on 3 May 2017.
Flakes's avatar
 Location: Adelaide, SA
 Member since 27 February 2010
 Member #: 630
 Postcount: 392

Hi Clive

Not too sure what I am going to do with it as yet. The case is way too good to "Throw" out. I am unsure as to what is going to happen with it.

Ian

Might be a good conversion but the overall presentation inthe radio was a bit rough. Its going to be my next project when I finish another Philips that I will write an article for...


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Valve radios, They just don't make them like they used to

 
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