I noticed that the power transformer has a blob of wax on it, so it appears it has been overheating in the past.

It would be a good idea to check the 3 resistors around the output valve (500K, 220 ohm, 220K) to make sure they are within tolerance.

As mentioned I would not expect a grid stopper, or grid leak on a 6V6 to be in tolerance. Where there is a cathode bypass cap old & not used it can impinge on the bias & loading especially if it shorts, or is punched through by a failed open, cathode resistor.

I, as best can be, (noting there are some that cannot be tested accurately in circuit,) check all resistors: Rework is time wasting and any work risks damage, more so, rework

Replaced 220K and 220ohm. 500K reading 800K (the 30's resistor) but not sure of the Wattage.
Not sure how to read these old resistors, but the 10K ( getting hot) paralleling 100K supplies 184V at pin 4 of 6U7.
Removing it reads 76V.
The substituted coil does have hollow hexagonal core. The label reads, AEGIS J 9/10.
The oscillator is working.
I have replaced 240V cord with IEC cord, earthed, and inverted gland as suggested.
The filter capacitors are rated at 16mF, I have only 24mF. Will these do?.
The red square in the middle of the dial is too damaged to see anything.
Thanks everyone for their input.

Hi, Arcadus, the tolerance on the original electros was probably very wide.
The only tech reason not to go too high is too large values may encourage high peak voltages before the output valve draws current.
You could put 2 in series to reduce to 12 mf or so. Probably has 8mf to start off with.

The most urgent thing after the power cord is to reef out all those WAX caps that are guaranteed to leak, driving the output valve into grid current or loading the AGC line or a HT line.

The wax on the tranny can be normal it is very low temp melting point. However if the WAX coupling cap is driving the output valve positive the HT current could be way high and warming the show up.

Fred.

The first cap of a choke input filter where there is a 5Y3 / #80 should ape what was there and they are normally 535 peak volts. I normally use 600V. Increasing the value of that first cap will raise the voltage and that could be undesirable as it will also increase current draw.

Beware: Most of those older circuits were measured with 1000 ohm per volt meters, or they don't bother to mention that. A digital meter may not like the RF component, but at around 11meg resistance, won't load the circuit as much & will read high. If the "B" voltage is to high & the heater voltage is correct drop the first cap to 10uF.

I normally use 1 Watt resistors to get the voltage rating and keep the inventory down, but do keep some higher & lower.

The Control grid in most of those radios draw insignificant current. Where you can get into strife is often caused by the bean counters. early HMV nippers 51-xx and such had R22 for the screens as two 22K in parallel, that suddenly became a 10K. However, I squared R tells us that the current to the screens involved exceeds 1Watt. So I keep 2 Watt ones to replace them or use the 22K parallel arrangement as before.

Red square: Damaged in what way any image, or graphic should be on the inside of the glass.

There is info out there on how to read the old RMA resistors. 500K would likely have a green body with a black tip on the end & a yellow dot.

Marc

I will order the right caps then check the voltages again.

Not sure about the resistors that have a black body but only have two colours, one main and one stripe.

I have taken a photo of the dial and has been sent.

One should not have an issue with resistors. Just look at the place it is in the circuit, that is a basic, one needs to learn. The one in the bottom RH corner showing the black & green with an orange band is liable to be an out of spec 50K (they fail like crazy). The one under a 0.05 cap (top) with the green band is possibly AGC & 1Meg.

I played a game of "spot the resistor value" by colour.

Up the top near the volume control I can see a 3.3 and 1 meg, probably part of the AGC line.
Down a bit around the output valve is a huge 500k carbon and under that is a 50k probably the grid resistors.
There is a later model 330k there doing ???. Plate resistor?
The wire wound resistor looks like 230 ohm that would be the cathode bias.
Moving to the right around the IF valve there is a 100k and then two 10k.
Lastly there is a 50k grid resistor on the convertor.
There has to be a few more in there like the bias for the first two valves or maybe they are grounded and AGC doing the bias.

I think I got the colours and decimal points correct.
Its funny how a lifetime of squinting at all sorts of resistors makes you recognise them by the whole shape and pattern of the spots and bands together then with the actual colour value. One glance at the big carbon said to me "500k" without even working it out.
That chassis has a whole mix of year resistor types, I guess the set has been steadily worked on over the years.

How was that?

Fred.

Yes Fred, like you I can just look at a resistor and read its value without having to work it out.

Did I hear someone say "Get a life!"??

After looking at resistors for 50 years I do the same. The only ones that require some thought are the 1% ones with the extra band.

I assume the old black bodied (they are all black) resistors use the black as the second digit considering the first digit is represented as brown with the orange stripe being the multiplier as in the 10K. They must be decadic values not as modern resistors with variable second digits.

Yes.

Main body colour = 1st digit
End colour = 2nd digit
Band = number of zeros following.

EG

Green body, black end, orange band = 50,000 ohms

Photo uploaded to Post 21.

330K may be the plate of the 2nd detector 1st Audio. Its probably a new one as they also fail like crazy (Somebody in the know was paying attention). Watch the 50K on the Pentagrid if its on a grid it actually may go to cathode not ground (Test it). More than 10% variance is liable to see it get the chop here.

Yikes----

Wrong forum,

Apologies to all, shall try again.