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 Caps needed for AWA P1 restoration
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 Return to top of page · Post #: 1 · Written at 4:35:07 PM on 2 February 2013.
Chris Ronayne's avatar
 Location: Wauchope, NSW
 Member since 1 January 2013
 Member #: 1269
 Postcount: 576

Hi all,

I need some electrolytic and polyester capacitors for my AWA P1 that I'm restoring. I've looked around and can't find any local shops with them, and the lack of nearby collectors and restorers doesn't help (there are collectors and restorers in town but I have no way to find out who they are and contact them).

I need the following caps:

----------------------------
Electrolytic, axial lead
----------------------------

200v 100μF
250v 100μF
350v 100μF
450v 2.2μF

----------------------------
Electrolytic, radial lead
----------------------------

125v 100μF (x2)

----------------------------
Polyester, axial lead
----------------------------

600v 0.047μF (x2)


I'll be able to pay for these with a post office check, if anyone has some they are willing to sell.

Thanks,

Chris


 
 Return to top of page · Post #: 2 · Written at 7:01:56 PM on 2 February 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1057

According to the parts list, Page 5, you'll need as follows:

Electrolytics - 2 X 100μF, 200 v; 2 X 100μF, 125 v; 150 μF 200 v; 2μF, 450 v & 2μF, 300 v

Paper cap replacements - .0068, 1800 v; .047μF, 600v & .047μF, 1000v. (see email)

The other caps, the mustard Philips & blue Ducons should be okay.

Cheers.


 
 Return to top of page · Post #: 3 · Written at 7:11:12 PM on 2 February 2013.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5762

Steve Savell may be able to assist with at least some of those values.

http://radiorevivalparts.com/.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 4 · Written at 8:36:02 PM on 2 February 2013.
Chris Ronayne's avatar
 Location: Wauchope, NSW
 Member since 1 January 2013
 Member #: 1269
 Postcount: 576

Monochrome, I don't know about this set. It does seem to have some different component values to that in the manual and circuit diagram. I took a quick look at the Ducon 250v 100μF on the side of the set (point-point wiring, not PCB. Not sure what circuit this is), and it does appear to have been replaced. I don't know what other components may have been replaced though to accommodate these value changes. I'm not the best ar following circuits/reading circuit diagrams either.

I suppose this would be an easy restoration for an experienced collector..?

I'll send some photos to Brad to post.

Cheers,

Chris


 
 Return to top of page · Post #: 5 · Written at 9:28:00 PM on 2 February 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1057

The service manual I sent you is dated June 1965. I believe this model was made for a number of years, so there could of been "mods" with later production runs.

Page 7 has the Location Chart. You'll see the 2 photos of the chassis inside a numbered/lettered grid box. You should be able to cross reference the individual components with the list below. For instance, the 2 radial 100μF, 125v (C423 & C424) are located at E2 & F2. The 2 axial 100μF, 200v (C420 & C422 are located at H16 & H14 (says H13 on the list).

The 100μF, 250v electro you mentioned is either C420 or C422. These capacitors are in the power supply and are for smoothing the ripple in the HT. If it was replaced in the past, maybe there wasn't a 200 volt on hand and a 250 volt was used instead. That's okay, better more than less!

C319 (.0068μF 1800v) is a important capacitor to replace. You will get away with a 1600 volt rated though.

I hope this is of some help.

Cheers.


 
 Return to top of page · Post #: 6 · Written at 9:43:34 PM on 2 February 2013.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5762

Circuit diagrams can be quite complex but be patient with it and you will eventually get the hang of it. I remember back to when I did my electrical trade and wiring huge control switchboards with one colour and one size of cable seemed an impossible task. I ended up getting used to it though - like anything high tech and new, it just takes time.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 7 · Written at 7:31:42 PM on 3 February 2013.
TV Collector's Gravatar
 Location: Ballarat, VIC
 Member since 4 January 2011
 Member #: 803
 Postcount: 456

From what I've seen from the pictures of your P1, it has had a few components replaced in the past which is why there are differences between what you can see in your set and the "official" parts list. Some of these replacement parts may not be the correct part (C319 must be rated at 1600v or it will fail).

There were at least three different versions of P1 portables with changes in the circuit. I don't think the parts you have mentioned were affected by these changes but I'll check.

You can get all the parts from WES components in Sydney or "Just Radios" in Canada. Most radio parts suppliers won't stock capacitors with a voltage rating higher than 630v so choices of suppliers is limited.

Since you have had the TV running already the power supply electrolytics are probably OK. If they don't get warm after the TV has been on for 5 to 10 minutes then they should be safe to use.

Out of curiosity with the TV turned OFF, measure the resistance across C319. If it is less than 500 ohms then it has probably failed short circuit since you said it has a 100v rating.


 
 Return to top of page · Post #: 8 · Written at 8:08:15 PM on 6 February 2013.
Simplex's Gravatar
 Location: Bathurst, NSW
 Member since 7 August 2008
 Member #: 336
 Postcount: 302

Apart from Wes Components as mentioned Evatco in Queensland has a good range of caps.


 
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