EAR De-Luxe Record Player

[ms660]

Originally Posted by Bigears

is this right Lawrence

Yes, so far as I can make out.

Lawrence.

[Bigears]

Hi Lawrence could you please indicate the HT reservoir and filter capacitor on the schematic and the pictures please much appreciated , thank you

Regards Ken

[Station X]

C13 Reservoir.
C12 Smoother.

They'll be in the big can labelled "HUNTS" along with C11.

Personally I think that before replacing them you should check the resistance across the HT line. There may be a very obvious short.

That Red/Yellow/Black Plessey electrolytic capacitor needs to go too.

[Bigears]

Thanks Graham

[Bigears]

would it be ok to replace the Plessey 25v 25uf 70c with a 22uF 25V Radial 105 deg Capacitor

[Sideband]

Yes

[Bigears]

Hi Guys, would I be right in saying this is 42.00k Ohms

[ms660]

Originally Posted by Bigears

Hi Guys, would I be right in saying this is 42.00k Ohms

No, it's 220kOhms.

Lawrence.

[Herald1360]

Or maybe 330k- depends on whether the orangey red rings are really red or orange.

[DMcMahon]

There are three 220k shown on Lawrence's schematic namely R6, R11 & R12.

Check the connections to make sure it is one of the above.

What value does it measure, most likely it will measure > 220k

David

[ms660]

From the latest photo in Post#67, R5 does look now to be 100k.

Lawrence.

[DMcMahon]

You have very good eyesight Lawrence both to identify it as 100K and more difficult to identify it as R5.

I guess from the ? against R5 on your schematic that the value of R5 came into question in the older Thread.

David

[ms660]

Originally Posted by DMcMahon

You have very good eyesight Lawrence both to identify it as 100K and more difficult to identify it as R5.

I guess from the ? against R5 on your schematic that the value of R5 came into question in the older Thread.

David

Yes that's correct the ? mark meant that I thought it could be 100k but wasn't totally sure but in the latest photo the colours Brown, Black, Yellow can be seen.

Lawrence.

[Lucien Nunes]

As per the above posts, the most important thing to do at this point is to measure the resistance from the red lead (of the big grey resistor) to the chassis, to start tracing what is pulling too much current from the rectifier and cooking the resistor. It's likely to be the reservoir capacitor but we don't know that yet.

However the reason for my post is that without intending to distract from the above, I can't help noticing that the replacement 50μF capacitor that has been installed in place of a red & black Plessey, appears in the pic in post 48 to have a date code of November 1959. Electrolytics go bad with age, especially if not used at all, so the replacement could easily be as life-expired as the original.

I leave main electrolytics in place if they are of reliable brands and in excellent functional condition, but where they have to be replaced it makes sense to use new, high-quality parts otherwise there is a risk of introducing new faults.

On a different and very minor side note about repair technique, had the metal rectifiers been left in-situ with the red lead disconnected, the diode could have been mounted between the resistor tag and the green lead still attached to the metal rec, and a neater repair would have resulted without one end of the diode floating in midair.

[Bigears]

It was my intention to replace it with an modern cap seems I have been had

[Bigears]

Hi Lawrence the reading I am getting is .210

[Bigears]

the reading I am getting from that yellow Red Red Orange resistor is Zero, nothing and no Continuity

[Station X]

Originally Posted by Bigears

Hi Lawrence the reading I am getting is .210

.210 what? You must state units.

[Bigears]

disregard this last post. ( Hi Lawrence the reading I am getting is .210 ) that fact is I am getting nothing from that resistor

[Bigears]

I am getting no resistance from the red lead of the big grey resistor to the chassis