What would I replace paper capacitors with? I'm going to recap a Philips 168 so I need electros as well and a 6v4 valve,dial cord, ect... What would be the best place to get these parts from, is there a one stop shop that deals in this stuff?

There is EVATCO & Steve also has offers.

Both should have the Metalised Polyesters (Yellow) 630VDC to get rid of the papers & Replace all Electrolytics, not just the filter ones if it has more.

6V4 is an unusual fail? or did is scarper off.?

WES components was the only one that I know of that had dial cord.

Dont forget to check the resistors as you change caps. Have a good look at the sides of the Power Transformer. I've seen a few of theirs, incuding my 132L, have the windings starting to come out of the side (don' play with them... advise).

Marc

Hi Marc,The 6v4 wasn't there when I bought it,I only discovered it missing later.Ive looked on eBay ect...for another one with no luck. A few more questions, can I substitute a 30μF electro cap with a 33μF cap? or a pair of 2000uf,3volt,electro caps that go to the filaments with 2200uf,6volt ? Wouldn't they still be within 20% tolerance?How do I contact Steve for parts does he have a website? The transformer windings on this one are OK it has just come out a smidgin,I can see what you mean by not touching it.

33 is Ok ...those things had a fairly wide tolerance. do not go bigger.

Have you got a circuit for this? If it's valve, there is no way it would have 2000μF on heaters of filaments.

6X4 is a heater rectifier and likely running on AC. I think I need to see more info on this set , before we go much further.

Both suppliers have web sites steve has plugged his several times. EVATCO has valves.

Marc

Have you got a circuit for this? If it's valve, there is no way it would have 2000μF on heaters of filaments.

An alarm bell has gone off here. I'd make sure someone hasn't removed the rectifier valve and installed silicon diodes in its place using the valve socket as a terminal strip. This wouldn't explain the very low working voltage of the caps but it may explain the high capacitance.

The schematic says to filaments,with an arrow from the positive of capacitor 2000uf,3v.? It is AC/DC the on/off switch is on the dial shutter, open, its on,closed, its off.Ive checked out EVATCO but they don't seem to stock a 6v4 valve I'm still no wiser to the whereabouts of Steves website? You say he has plugged it a few times where has he plugged it? There is no search link to look for it or anything else,I cant upload a snapshot of the schematic or photos to show you what I'm on about without going through a lot of rigmarole.This site deserves better than this,just because its about vintage the site shouldn't be vintage as well.

The 168 is a mains/battery portable. The power transformer's LT secondary has two taps: one supplies the 6V4's filament, the other supplies the filaments of the low voltage valves via a DC circuit using a metal rectifier. The notes state filament volts under battery as 1.5 volts and on mains 1.3 volts. A wire-wound pot is provided for voltage calibration.

The reservoir and filter caps for the DC filament circuit are shown as 2000μF 3v.

I would say that 2000μF 6v volt caps would be okay in that role. (I doubt you'll readily find 3 volt versions these days.)

The AC/DC switch is shown on the schematic as S2 (a,b,c,d) and is stated as being a slide switch on the rear.

Yes, it would be helpful if Steve Savell's site (www.radiorevivalparts.com) was shown on the Outside Links page.

G'day Rosco,

There's instructions on how to get photos into your posts above the form fields for commenting.

The search feature is a good idea and has been on the to-do list for a while. Leave it with me and I will see what I can do.

Steve has a new website located at http://www.radiorevivalparts.com/.

Another option is to join one of the vintage radio clubs, some of which have 'valve banks'.

Ok, cleared up one question, better safe than fry something.

Might be an idea to get a circuit off GTC if you do not have one? Jaycar have 10V 2200μF electrolytics, so that's no issue.

EVATCO has 6V4/EZ80 listed? (not in audio tubes) I am not seeing big issues yet.

I have now sourced a circuit

Marc

I believe Rosco has indicated that he has a copy of the schematic.

All fine, now I have a copy I can relate to what is being referred to in the set.

Marc