Help appreciated to identify this Airlord model with a Garrard Autoslim record changer

There are other pics on the internet but no model identified.

I have not yet taken the radio/amp out to check the valve line-up (though I know it has a couple of 6BM8) but hoping someone will recognise the model from the pics (I have too many radios in pieces to take another chasis out right now!)

Although not real clear, the knobs look to be Astor.

Wayne.

I think it says Astor bottom left of the cabinet front.

Airlord is the house brand of Boans department store in Perth.

The model depicted is a rebadged Precedent (AW Jackson). This was a popular model (with short-wave) and was sold throughout the 1960’s.

I can’t recall the actual model number (I can tell you later tonight). There is usually a paper label stapled on the back of the cabinet with the model written on it.

EDIT: model S25

https://www.kevinchant.com/uploads/7/1/0/8/7108231/361-561-761_1.tif

Sorry I missed all the comments a few days ago and even forgot I posted here...age!

Definitely Airlord on the front of cabinet. I checked the valve line-up and it is the chassis Model 761 A.W. Jackson (thanks MonochromeTV).

I didnt know it was known as the S25 (where did you get that from?) and have not found any advertising material. The speaker code printed on the Rola's is Aug 1960 and the Garrard Autoslim fitted has the one-piece tone arm, which I understand is late '59/60...so the gram is probably late 1960.

I have the circuit diagram from K.Chant. Only issue is a heavy mains hum, so I am getting the meter out soon. What should I prod?

Airlord Circuit Diagram

Re the hum, if it otherwise works, the hum is about the same on both channels and it's on the radio as well, don't bother with the meter, just change the electros.

The hum is common to both channels and radio/gram. There are 30 caps. I have sent a pic of the circuit diagram for Brad to upload. I assume the ones to replace would be C31, C11 and C12 to begin with. I dont have a manual for the set, so have no specs/working voltages for anything yet. Not going to recap the whole set...prefer to target what is likely and learn what was wrong.

Document uploaded to Post 5.

There are 3 electrolytic caps. You'll need to change all 3. That's C11, 12 and 31 on the schematic.

Other caps are probably polyester (not wax paper) and can remain. This depends on the production year, only the early builds had paper caps. Most builds used Ducon blues or those flesh-coloured Anodeon caps, they are all OK.

I don't think Jacksons ever used those white UCC caps. If there are white caps, "Di-pol 100" are OK, but if they have "Hi-Qual 100" on them, they are paper and will be bad.

If the chassis has wax paper caps, as a minimum you should replace C21, C22 and C29 to protect your 6BM8s.

Oh BTW, look up 9 The Crescent Annandale NSW.
That park is where your radiogram was made!

S25 is the cabinet style and this is usually shown on a small cardboard label stapled somewhere on the back.

The S25 was sold between 1962 and 1970 and going by the dates on the speaker you probably have an earlier version.

Ian #9 - Thanks for that...all noted...I have ordered/bought the ones recommended.

Monochrome #10 - the cabinet has 'C64' chalk markings to inside back and sides and Serial No. 21518 stapled to the rear. The OPT's have a sticker on them 'S 761', confirming the Jackson chassis model number.

Took the chassis out and there is a date stamp 18 Oct 1965 on a wooden divider adjacent to the chassis, so it's later than I thought.

I've taken two pics of the underneath of mine (will send to Brad for uploading) and looks neat and tidy.

The three main caps, meter-tested in circuit with power off:

C31/16μF is reading 32μF across
C11/24μF is reading 34μF across
C12 24μF is reading 43μF with ref to chassis

...not sure what to read into these but can replace them anyway as thankfully, these are not in a can and are easily accessible. They are rated 300v. Here in Oz, closest I can get is 22uf/500v for the 24μF replacements...should be ok?

C21, C22 and C29 are 'Polyfoil', so I will leave them alone for now.

I checked R9, R10 and R11 and they are all good.

You can't always trust capacitance meters as they often don't take ESR into account.

Polyfoil? That'd be those yellow AEE caps, made in Brookvale. They'll be good.

Photos uploaded to Post 12.

I would be skeptical about the yellow caps. The black band was common on waxed paper caps. This indicated "outside foil": That end went closest to ground. Most modern caps are not marked.

Waxed paper type caps were made with plastic tubes. If they are polyester, its usually printed on them.

If in doubt, unsolder on end of one, or two, and insulation test them at say 250 VDC. Most bad ones will be below 1Meg, however, that is a fail and if any leak here, they are duds. Non polarised caps should not pass DC.

Fail used to be:
For screen decoupling: Not less than 50Megohms
For coupling: Not less than 200Megohms.