Dynatron HFC 209 - UK Vintage Radio Repair and Restoration Discussion Forum

marcus 3500 · 10th Feb 2008, 9:59 pm

Hi all

After watching a BBC four program on Marc Bolan i decided to have a look at this music centre ( Made in 1975 ) so i could play Born to Boogie

The only fault on this was one channel getting red hot quite easily found that one of the BD130 transistors short, Fitted a nice new 2N3055 but the heatsink could still fry an egg the sound was perfect with no buzz or hum but when it was first switched on there was a loud thump from the speaker, with the working channel only making a slight thump. After changing the 3 100UF caps on the amp board it still ran quite warm compared with the working channel.

A good hour passed with me checking all the transistors etc and it still was the same.Then i found it if i knocked the amp board it would make a large thump, all the joints looked perfect but soldering all of them cured the thumping output and now it runs at a more normal temperature

After cleaning all the nicotine off and a quick polish it looks and sounds better than the mordern Panasonic i've been using in the workshop.

Regards

Marcus.........

Steve_P · 10th Feb 2008, 10:46 pm

Not only are these things good, but people do collect them. You have found out why - they are very good!

Makes me wonder why they bothered with CDs....

Cheers,

Steve P.

JLH-AMP · 10th Feb 2008, 11:03 pm

That's lovely!
There was a (now long-closed) tv/radio/hi-fi shop in Church Road, Hove, Sussex that used to carry Dynatron, Hacker, etc. I used to go in and oggle this sort of stuff. I think they got fed up with me in the end.

howard · 10th Feb 2008, 11:26 pm

Hello Marcus,

That's very nice. I remember music centres being popular back in the 1970s, but not the kind of item I'd collect myself but definitely well worth restoring and using again.

Howard

Tazman1966 · 11th Feb 2008, 2:06 pm

Hi Marcus.

A nice job there.

I used to have two Garrard SP25 turntables when me and a mate used to do mobile discos back in the day......

marcus 3500 · 12th Feb 2008, 12:10 am

Hi all

Thanks Steve, JLH-AMP, Howard and Tas

Regards

Marcus.........

10th Feb 2008, 9:59 pm	#1
marcus 3500 Retired Dormant Member Join Date: May 2006 Location: South Yorkshire, UK. Posts: 351	Dynatron HFC 209 Hi all After watching a BBC four program on Marc Bolan i decided to have a look at this music centre ( Made in 1975 ) so i could play Born to Boogie The only fault on this was one channel getting red hot quite easily found that one of the BD130 transistors short, Fitted a nice new 2N3055 but the heatsink could still fry an egg the sound was perfect with no buzz or hum but when it was first switched on there was a loud thump from the speaker, with the working channel only making a slight thump. After changing the 3 100UF caps on the amp board it still ran quite warm compared with the working channel. A good hour passed with me checking all the transistors etc and it still was the same.Then i found it if i knocked the amp board it would make a large thump, all the joints looked perfect but soldering all of them cured the thumping output and now it runs at a more normal temperature After cleaning all the nicotine off and a quick polish it looks and sounds better than the mordern Panasonic i've been using in the workshop. Regards Marcus......... Attached Thumbnails

10th Feb 2008, 10:46 pm	#2
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Dynatron HFC 209 Not only are these things good, but people do collect them. You have found out why - they are very good! Makes me wonder why they bothered with CDs.... 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...?

10th Feb 2008, 11:03 pm	#3
JLH-AMP Retired Dormant Member Join Date: Feb 2008 Location: Sussex Posts: 2	Re: Dynatron HFC 209 That's lovely! There was a (now long-closed) tv/radio/hi-fi shop in Church Road, Hove, Sussex that used to carry Dynatron, Hacker, etc. I used to go in and oggle this sort of stuff. I think they got fed up with me in the end.

10th Feb 2008, 11:26 pm	#4
howard Nonode Join Date: May 2005 Location: Godalming, Surrey, UK. Posts: 2,593	Re: Dynatron HFC 209 Hello Marcus, That's very nice. I remember music centres being popular back in the 1970s, but not the kind of item I'd collect myself but definitely well worth restoring and using again. Howard

11th Feb 2008, 2:06 pm	#5
Tazman1966 Nonode Join Date: May 2006 Location: St Albans, Herts, UK. Posts: 2,193	Re: Dynatron HFC 209 Hi Marcus. A nice job there. I used to have two Garrard SP25 turntables when me and a mate used to do mobile discos back in the day...... __________________ All the very best, Tas

12th Feb 2008, 12:10 am	#6
marcus 3500 Retired Dormant Member Join Date: May 2006 Location: South Yorkshire, UK. Posts: 351	Re: Dynatron HFC 209 Hi all Thanks Steve, JLH-AMP, Howard and Tas Regards Marcus.........