Dynatron Henley RG33W radiogram - UK Vintage Radio Repair and Restoration Discussion Forum

Vintage84 · 17th Apr 2016, 7:45 pm

Hi all,
I've recently acquired a Dynatron Henley RG33W radiogram which contains a Garrard type AT6 Mark 2 turntable. I'm attempting to test it, but have no knowledge of these (I have read through the instruction manual, which the previous owner helpfully provided).
The radiogram turns on but only functions if I hold down the required function button (e.g. I have to continuously hold the gram button down to keep power to the turntable, likewise with the vhf button for the fm radio). It plays fine, until I let go of the buttons.
Any suggestions/guidance would be appreciated!
Thanks

Michael Maurice · 17th Apr 2016, 8:36 pm

Hi

Almost certainly the switches require cleaning with Servisol or other type of switch cleaner.

This requires dismantling of the radio/amplifier section. You will also need to have the record player mechanism overhauled as it will probably be seized up due to dried up grease.

I hope this helps you

Vintage84 · 17th Apr 2016, 9:16 pm

Hi Michael,
Thanks for your advice on the switches - I'll pick some cleaner up tomorrow.
For the record player, the instructions mention sewing machine oil - is that still the best thing to use?

peter_sol · 18th Apr 2016, 12:38 am

If the buttons will not stay down, the latch on the mechanism needs freeing up with WD 40 or switch cleaner might do.

Edward Huggins · 18th Apr 2016, 7:32 am

Sewing machine oil is ideal for use on the Garrard AT6 autochanger. Beware of a short cut by using WD40 as it will often disperse essential lubrication where it's needed - but it's ideal to free up seizures. Edward

Vintage84 · 19th Apr 2016, 9:59 pm

I cleaned up the switch mechanism and the buttons hold down fine now. Unfortunately, I think I must have shorted out a circuit though as I now get no power to the radio! Any hints of where to start before I start tracing it all through with a multimeter?

Edward Huggins · 19th Apr 2016, 11:48 pm

Is the mains on/off one of the piano keys or on the volume control? Edward

Vintage84 · 20th Apr 2016, 5:51 am

Piano keys - it should turn on when pressing one of the functions (vhf or gram) and there is a separate off piano key.

Vintage84 · 20th Apr 2016, 8:35 am

I should also add that I believe there is power running through the new switches as they operate a bulb over the record player which switches on/off with these.

Edward Huggins · 20th Apr 2016, 11:39 am

Maybe you have overspayed these and affected the latching functions? Edward

Michael Maurice · 20th Apr 2016, 3:27 pm

This is a valved radiogram chassis, if you are new to servicing these then certain precautions must be taken as there are high voltages within it.

There are certain parts, mainly capacitors which MUST be replaced.

I think the light on these radiogram is mains operated.

Does the light still light when the off key is pressed? If so then it has nothing to do with the mains on/off switch.

You need the service manual, available here, and you must proceed with caution.

Vintage84 · 20th Apr 2016, 4:12 pm

Thanks both for your responses.

Michael - where is the service manual document you mention available from? It is indeed a valved radiogram, but the light does switch off with the off piano switch

Station X · 20th Apr 2016, 4:23 pm

There's reference to a model RG33 here, but it has no 'W' suffix. Uses piano keys though, so may be the same model.

http://www.service-data.com/product....18/1841/a11318

Michael Maurice · 20th Apr 2016, 5:56 pm

I dont think the W has any significance for the service manual purpose

peter_sol · 20th Apr 2016, 8:56 pm

you need to be sure of the model number. RG33 does not appear to be the "Henley"

Vintage84 · 21st Apr 2016, 9:18 am

I based the model name/number on the documents that came with it. Does anyone know if it's stamped on these radiograms anywhere?

Station X · 21st Apr 2016, 9:38 am

Quote:

Originally Posted by Station X

There's reference to a model RG33 here, but it has no 'W' suffix. Uses piano keys though, so may be the same model.

http://www.service-data.com/product....18/1841/a11318

Looking at the service sheet linked to above, it doesn't specifically mention a model RG33.

This site offers a service manual covering the RG33W model:-

http://www.shopingathome.com/Circuit...s/Dynatron.htm

Not cheap though!

Vintage84 · 21st Apr 2016, 12:59 pm

I'll try to work out the exact model tonight.

One thing I found was that the internal fuse has blown after I cleaned the switches. Should it be replaced with a fast blow or time delay/antisurge fuse?

AC/HL · 21st Apr 2016, 3:32 pm

Assuming it's the original, the type and rating will be engraved on one of the end caps.

Vintage84 · 21st Apr 2016, 7:31 pm

It definitely appears to be a Henley RG33W (see attached).

17th Apr 2016, 7:45 pm	#1
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Dynatron Henley RG33W radiogram Hi all, I've recently acquired a Dynatron Henley RG33W radiogram which contains a Garrard type AT6 Mark 2 turntable. I'm attempting to test it, but have no knowledge of these (I have read through the instruction manual, which the previous owner helpfully provided). The radiogram turns on but only functions if I hold down the required function button (e.g. I have to continuously hold the gram button down to keep power to the turntable, likewise with the vhf button for the fm radio). It plays fine, until I let go of the buttons. Any suggestions/guidance would be appreciated! Thanks

17th Apr 2016, 8:36 pm	#2
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,224	Re: Dynatron Henley RG33W radiogram Hi Almost certainly the switches require cleaning with Servisol or other type of switch cleaner. This requires dismantling of the radio/amplifier section. You will also need to have the record player mechanism overhauled as it will probably be seized up due to dried up grease. I hope this helps you __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/

17th Apr 2016, 9:16 pm	#3
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram Hi Michael, Thanks for your advice on the switches - I'll pick some cleaner up tomorrow. For the record player, the instructions mention sewing machine oil - is that still the best thing to use?

18th Apr 2016, 12:38 am	#4
peter_sol Octode Join Date: Aug 2003 Location: Welwyn Garden City, Herts. UK. Posts: 1,906	Re: Dynatron Henley RG33W radiogram If the buttons will not stay down, the latch on the mechanism needs freeing up with WD 40 or switch cleaner might do.

18th Apr 2016, 7:32 am	#5
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dynatron Henley RG33W radiogram Sewing machine oil is ideal for use on the Garrard AT6 autochanger. Beware of a short cut by using WD40 as it will often disperse essential lubrication where it's needed - but it's ideal to free up seizures. Edward

19th Apr 2016, 9:59 pm	#6
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram I cleaned up the switch mechanism and the buttons hold down fine now. Unfortunately, I think I must have shorted out a circuit though as I now get no power to the radio! Any hints of where to start before I start tracing it all through with a multimeter?

19th Apr 2016, 11:48 pm	#7
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dynatron Henley RG33W radiogram Is the mains on/off one of the piano keys or on the volume control? Edward

20th Apr 2016, 5:51 am	#8
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram Piano keys - it should turn on when pressing one of the functions (vhf or gram) and there is a separate off piano key.

20th Apr 2016, 8:35 am	#9
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram I should also add that I believe there is power running through the new switches as they operate a bulb over the record player which switches on/off with these.

20th Apr 2016, 11:39 am	#10
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dynatron Henley RG33W radiogram Maybe you have overspayed these and affected the latching functions? Edward

20th Apr 2016, 3:27 pm	#11
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,224	Re: Dynatron Henley RG33W radiogram This is a valved radiogram chassis, if you are new to servicing these then certain precautions must be taken as there are high voltages within it. There are certain parts, mainly capacitors which MUST be replaced. I think the light on these radiogram is mains operated. Does the light still light when the off key is pressed? If so then it has nothing to do with the mains on/off switch. You need the service manual, available here, and you must proceed with caution. __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/

20th Apr 2016, 4:12 pm	#12
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram Thanks both for your responses. Michael - where is the service manual document you mention available from? It is indeed a valved radiogram, but the light does switch off with the off piano switch

20th Apr 2016, 4:23 pm	#13
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dynatron Henley RG33W radiogram There's reference to a model RG33 here, but it has no 'W' suffix. Uses piano keys though, so may be the same model. http://www.service-data.com/product....18/1841/a11318 __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

20th Apr 2016, 5:56 pm	#14
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,224	Re: Dynatron Henley RG33W radiogram I dont think the W has any significance for the service manual purpose __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/

20th Apr 2016, 8:56 pm	#15
peter_sol Octode Join Date: Aug 2003 Location: Welwyn Garden City, Herts. UK. Posts: 1,906	Re: Dynatron Henley RG33W radiogram you need to be sure of the model number. RG33 does not appear to be the "Henley"

21st Apr 2016, 9:18 am	#16
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram I based the model name/number on the documents that came with it. Does anyone know if it's stamped on these radiograms anywhere?

21st Apr 2016, 12:59 pm	#18
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram I'll try to work out the exact model tonight. One thing I found was that the internal fuse has blown after I cleaned the switches. Should it be replaced with a fast blow or time delay/antisurge fuse?

21st Apr 2016, 3:32 pm	#19
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: Dynatron Henley RG33W radiogram Assuming it's the original, the type and rating will be engraved on one of the end caps.

21st Apr 2016, 7:31 pm	#20
Vintage84 Retired Dormant Member Join Date: Apr 2016 Location: London, UK. Posts: 50	Re: Dynatron Henley RG33W radiogram It definitely appears to be a Henley RG33W (see attached). Attached Thumbnails