Bush DAC 81

[tiv48]

I did not want any more 1940/50's woodys but a shop in stroud had two a DAC81 and a pb61 talking to the owner he told me they were for show only and he was not allowed to sell them for safety reasons. and would have to go for recycling.
so I asked if he would give them to me and I would give him a donation to the charity that owned the shop . Any way £10 and they were mine
i thought I would start on the easy one so here we go repair (not restoration) of a BUSH DAC81
pictures show work to be done.
a lack of time may mean this takes a few weeks
Rob T

[AlanBeckett]

That one looks OK Rob, apart from the Grill Cloth and a few Wax Caps.
What's the 'thing' behind the Mains Socket?

Alan

[pwdrive]

According to the schematic they are HF chokes, one in the neutral and one in the live, the mains switch is S.P.S.T in the chassis (neutral) line.

Lawrence.

[Radio Fixer]

Looks like you have some vertical tag panels.

Only restored one that had them a Murphy A98. Beautiful condition radio apart from falling apart rubber wiring and the fore mentioned tag panels. These were far too small for many of the big waxies so I didn't re-stuff (black mark!).

   
   

Being as I was going to rewire the chassis I took the panels out ...

   


Long job and after all that it doesn't work that well.

Very tactile though.

Sorry! if I'm out of order Rob. I'm not high jacking your post, just extending it.

Gary

[AlanBeckett]

According to the schematic they are HF chokes, one in the neutral and one in the live

Ah, so, to keep the rubbish out from DC Mains?

Alan

[pwdrive]

Or the AC mains.

Lawrence.

[tiv48]

I had to remove the tag panel at the rear to get at the 0,2uf that was installed on the back.
Rob T

[singlepentode69]

You have got to love the woodies look fowRd to seeing the finished set
Regards
Robin

[tiv48]

well have now changed all the wax caps
apply mains via 40 watt bulb for 10 minuets then switch to full mains .
dial lamps light as do valve heaters .
touching the gram input produces buzz so audio stage ok but no signals and yes I remembered to plug in an aerial.
touching the top cap of the ECH35 did not produce any sound so tried another one.
I now have a strong signal from 1500 mt LW and week stations on MW and SW.
taking these latest photos I find there is another wax cap hidden behind the rear panel will have to work out what it does and change it.
as an aside I did not have any 16/16mf caps so fitted a 16/32uf 16uf to the rectifier.
next will be to change that cap and check the resistors.
I could realy do with some voltage readings,
rob t

[AlanBeckett]

That sounds promising Rob, and EC35s are pretty solid.
Press on.

Alan