Dac 10 - UK Vintage Radio Repair and Restoration Discussion Forum

Dr-Watts · 14th Mar 2009, 5:52 pm

I've wanted one of these for years, but never managed to get one.
I was offered this from a friend, it was his late great aunt's and it hadn't seen the light of day since 1985.
Basically his mum told him to take it home to get it out of her house recentley.
The set was complete with no cracks or missing bits and he offered it to me for 'an interesting swap', this done I bought it home.

When I opened it up I found that it was in excellent untouched condition.
After a stripdown I started by changing all the wax caps (fairly nice job on this set !)
After checking all the resistors I found that even most of these were in spec.
I replaced 4 in total that 'were' wildly out of spec.
Bearing in mind that it's not seen the mains for a good 25 years I decided to warm it up on a variac for a few hours, starting at 50V, then 75V, then 100V.
At 150 Volts the dial lights could be seen to warm up and some heaters were lighting up. The HT also started to rise, this I kept an eye on measuring the voltage and kept an eye on the cap for any nasty seepage.
At 200 Volts the sound started to rustle up.
This was done over about an hour, the set was then left to run for an hour and then it treated it to the full goodness of the mains.
The sound came up nice and loud and it sounded nice

I've spent today with the Bakobrite and Flash Liquid and put the set back together. It works really well and I've got to say I'm amazed how sensitive it is

It's been running for 3 hours now, no nasty smells or pop's, so I think this could be the new kitchen radio ~ Even Faith agrees !

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Hope you've enjoyed reading this, for more pics and more detailed description please see my facebook page.

Kind Regards

Dr. Dave

slidertogrid · 14th Mar 2009, 6:04 pm

Nice job!

I have one in my collection given to me by a friend many years ago for helping him move house. They are almost a pleasure to work on and perform well (providing the "special" speaker is OK!) a much underrated set in my opinion!

Rich.

mickjjo · 14th Mar 2009, 6:21 pm

Lovely sets!

That looks a really nice example, I think I had about 4 of them through my hands trying to assemble all the best bits to make one good one

Don't be tempted to overtighten those 4 screws on the top!....

Regards, Mick.

Darren-UK · 14th Mar 2009, 6:22 pm

Looks nice. I notice the Bush badge is missing; they're glued on and usually drop off given time. I wonder if it's lurking somewhere at your friend's mum's house? Might be worth a look as these aren't easy to replace unless you make a repro.

Dr-Watts · 14th Mar 2009, 10:26 pm

It originally came from his late aunt's house back in the mid 80's !
So I doubt it

Good idea though

Dr. Dave

chipp1968 · 14th Mar 2009, 10:40 pm

The strange speaker was also used in my TV12 i found out recently !

Steve_P · 14th Mar 2009, 11:10 pm

Very nicely done, these are good sets.

Cheers,

Steve P.

Tazman1966 · 14th Mar 2009, 11:52 pm

Nice job Dave. I look forward to hearing it in action next weekend.

geofy · 15th Mar 2009, 12:11 pm

Just what the Doctor ordered

I once saw the 6" inverted magnet speaker in a TV22

Geof

chipp1968 · 15th Mar 2009, 12:20 pm

Tv 12 I think

geofy · 15th Mar 2009, 1:14 pm

Quote:

Originally Posted by chipp1968

Tv 12 I think

Does the TV12 look similar to the TV22, the artdeco bakelite (even though the fifties) style case of the TV22. I know the TV22 normally has the Celestion 6"*4" speaker (as TV24) but I recall seeing one with a 6" round inverted magnet speaker mounted at an angle behind the grill.
But this should be another thread as it is getting ot

Geof

howard · 15th Mar 2009, 4:10 pm

Well done Dave

Nice little sets these, did you manage to replace those capacitors without removing the tuner assembly ?

Howard

chipp1968 · 15th Mar 2009, 4:42 pm

Yes Geof same cabinet . Pre dates the 22 .
I wonder for what reason these speakers were made . do they take up less room ?not needed in the TV12 ! and to what else were they fitted I wonder . I am assuming the Dac10 is more tv22 period than tv12 ? I have a Dac 10 but didnt think it sounded as good as the 90. It may need more work of course . Its good to see the buttons are ok on this one . I have seen many that had degraded ,and Im sure I have seen a model with solid colour buttons ?

Dr-Watts · 15th Mar 2009, 9:28 pm

Quote:

Originally Posted by howard

Well done Dave

Nice little sets these, did you manage to replace those capacitors without removing the tuner assembly ?

Howard

Yes mate I did, I must admit it was quite fiddly but with a decent soldering iron and a really nice pair of 'pin nosed pliers' the job got done.
I did look at the manual for removing the tuning assay, but decided not to. (It don't look that easy !)

Thanks for all the nice comments folks

Don't know what to do next,
I've got that brilliant PYE record player, or 3 more radio's...

Dr. Dave

Tim · 15th Mar 2009, 9:45 pm

Nice job Doc.
Yours came up very nicely. The one I did had a cracked white bezel, but yours is lovely!!

Quote:

Nice little sets these, did you manage to replace those capacitors without removing the tuner assembly ?

I have a feeling I did move the tuner unit, but it wasn't too dificult an ISTR its possible to keep (most of it?)it connected and just move it far enough out of the way. It was also a long time ago!!

I was very pleased with the one I did. The panel in these and other Bush sets makes capacitor replacement very easy(and neat!!)

geofy · 16th Mar 2009, 12:10 am

Quote:

Originally Posted by chipp1968

Yes Geof same cabinet . Pre dates the 22 .
I wonder for what reason these speakers were made . do they take up less room ? not needed in the TV12

Thanks Chipp, I must have been looking at the TV12. The speaker might have been an attempt at magnetic shielding and then it was decided it would fit the DAC10 nicely as well.

Geof

Hunts smoothing bomb · 20th Mar 2009, 5:05 pm

Quote:

Originally Posted by chipp1968

Yes Geof same cabinet . Pre dates the 22 .
I wonder for what reason these speakers were made . do they take up less room ? not needed in the TV12

I believe they do, I haven't seen one but I think the magnet is on the inside of the cone rather than hanging off the back. Bit of a job finding one I would have thought if you have an o/c coil.

Cheers

Nickthedentist · 20th Mar 2009, 5:52 pm

Philips Disc Jockey record players used the same speaker, and CPC do an ideal replacement.

There's a thread about them here: https://www.vintage-radio.net/forum/...ead.php?t=7251

Nick.

Darren-UK · 21st Mar 2009, 9:56 am

The matter of a replacement 'speaker wasn't an issue with the OP's restoration, nor is it relevant in this Success Story to discuss which other equipments may or may not have used such a 'speaker.

As pointed out by Nick in his post above, the matter is adequately discussed elsewhere so the Moderators have decided to operate the preset 'close' button on this thread.

14th Mar 2009, 5:52 pm	#1
Dr-Watts Heptode Join Date: Dec 2006 Location: Milton Keynes, Buckinghamshire, UK. Posts: 696	Dac 10 I've wanted one of these for years, but never managed to get one. I was offered this from a friend, it was his late great aunt's and it hadn't seen the light of day since 1985. Basically his mum told him to take it home to get it out of her house recentley. The set was complete with no cracks or missing bits and he offered it to me for 'an interesting swap', this done I bought it home. When I opened it up I found that it was in excellent untouched condition. After a stripdown I started by changing all the wax caps (fairly nice job on this set !) After checking all the resistors I found that even most of these were in spec. I replaced 4 in total that 'were' wildly out of spec. Bearing in mind that it's not seen the mains for a good 25 years I decided to warm it up on a variac for a few hours, starting at 50V, then 75V, then 100V. At 150 Volts the dial lights could be seen to warm up and some heaters were lighting up. The HT also started to rise, this I kept an eye on measuring the voltage and kept an eye on the cap for any nasty seepage. At 200 Volts the sound started to rustle up. This was done over about an hour, the set was then left to run for an hour and then it treated it to the full goodness of the mains. The sound came up nice and loud and it sounded nice I've spent today with the Bakobrite and Flash Liquid and put the set back together. It works really well and I've got to say I'm amazed how sensitive it is It's been running for 3 hours now, no nasty smells or pop's, so I think this could be the new kitchen radio ~ Even Faith agrees ! Hope you've enjoyed reading this, for more pics and more detailed description please see my facebook page. Kind Regards Dr. Dave __________________ Do you have the scope to be a TV repair man

14th Mar 2009, 6:04 pm	#2
slidertogrid Octode Join Date: Apr 2005 Location: Peterborough, Cambridgeshire, UK. Posts: 1,898	Re: Dac 10 Nice job! I have one in my collection given to me by a friend many years ago for helping him move house. They are almost a pleasure to work on and perform well (providing the "special" speaker is OK!) a much underrated set in my opinion! Rich. __________________ The rotation of the earth really makes my day...

14th Mar 2009, 6:21 pm	#3
mickjjo Rest in Peace Join Date: Jul 2004 Location: Dartford, Kent, UK. Posts: 1,661	Re: Dac 10 Lovely sets! That looks a really nice example, I think I had about 4 of them through my hands trying to assemble all the best bits to make one good one Don't be tempted to overtighten those 4 screws on the top!.... Regards, Mick.

14th Mar 2009, 6:22 pm	#4
Darren-UK Retired Dormant Member Join Date: Apr 2003 Location: Blackpool, Lancashire, UK. Posts: 4,061	Re: Dac 10 Looks nice. I notice the Bush badge is missing; they're glued on and usually drop off given time. I wonder if it's lurking somewhere at your friend's mum's house? Might be worth a look as these aren't easy to replace unless you make a repro.

14th Mar 2009, 10:26 pm	#5
Dr-Watts Heptode Join Date: Dec 2006 Location: Milton Keynes, Buckinghamshire, UK. Posts: 696	Re: Dac 10 It originally came from his late aunt's house back in the mid 80's ! So I doubt it Good idea though Dr. Dave __________________ Do you have the scope to be a TV repair man

14th Mar 2009, 10:40 pm	#6
chipp1968 Rest in Peace Join Date: Jul 2006 Location: Somerset, UK. Posts: 2,356	Re: Dac 10 The strange speaker was also used in my TV12 i found out recently !

14th Mar 2009, 11:10 pm	#7
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Dac 10 Very nicely done, these are good sets. Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

14th Mar 2009, 11:52 pm	#8
Tazman1966 Nonode Join Date: May 2006 Location: St Albans, Herts, UK. Posts: 2,193	Re: Dac 10 Nice job Dave. I look forward to hearing it in action next weekend. __________________ All the very best, Tas

15th Mar 2009, 12:11 pm	#9
geofy Retired Dormant Member Join Date: Jun 2006 Posts: 1,798	Re: Dac 10 Just what the Doctor ordered I once saw the 6" inverted magnet speaker in a TV22 Geof

15th Mar 2009, 12:20 pm	#10
chipp1968 Rest in Peace Join Date: Jul 2006 Location: Somerset, UK. Posts: 2,356	Re: Dac 10 Tv 12 I think

15th Mar 2009, 4:10 pm	#12
howard Nonode Join Date: May 2005 Location: Godalming, Surrey, UK. Posts: 2,593	Re: Dac 10 Well done Dave Nice little sets these, did you manage to replace those capacitors without removing the tuner assembly ? Howard

15th Mar 2009, 4:42 pm	#13
chipp1968 Rest in Peace Join Date: Jul 2006 Location: Somerset, UK. Posts: 2,356	Re: Dac 10 Yes Geof same cabinet . Pre dates the 22 . I wonder for what reason these speakers were made . do they take up less room ?not needed in the TV12 ! and to what else were they fitted I wonder . I am assuming the Dac10 is more tv22 period than tv12 ? I have a Dac 10 but didnt think it sounded as good as the 90. It may need more work of course . Its good to see the buttons are ok on this one . I have seen many that had degraded ,and Im sure I have seen a model with solid colour buttons ?

20th Mar 2009, 5:52 pm	#18
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,846	Re: Dac 10 Philips Disc Jockey record players used the same speaker, and CPC do an ideal replacement. There's a thread about them here: https://www.vintage-radio.net/forum/...ead.php?t=7251 Nick.

21st Mar 2009, 9:56 am	#19
Darren-UK Retired Dormant Member Join Date: Apr 2003 Location: Blackpool, Lancashire, UK. Posts: 4,061	Re: Dac 10 The matter of a replacement 'speaker wasn't an issue with the OP's restoration, nor is it relevant in this Success Story to discuss which other equipments may or may not have used such a 'speaker. As pointed out by Nick in his post above, the matter is adequately discussed elsewhere so the Moderators have decided to operate the preset 'close' button on this thread.