Unknown Valve Radio
- colin.hepburn
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#1 Unknown Valve Radio
Hi All
I just acquired this old valve Radio not working due to parts and valves missing the two remaining valves Are MAZDA AC/VP2 and a MAZDA HL.41 DD condion unknown links to valves
http://www.r-type.org/exhib/aag0028.htm
http://www.r-type.org/exhib/aaa0619.htm
Can anyone identified this radio See PICS
I just acquired this old valve Radio not working due to parts and valves missing the two remaining valves Are MAZDA AC/VP2 and a MAZDA HL.41 DD condion unknown links to valves
http://www.r-type.org/exhib/aag0028.htm
http://www.r-type.org/exhib/aaa0619.htm
Can anyone identified this radio See PICS
- colin.hepburn
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- Location: Scotland Aberdeenshire
#3
Personally can't help you but post it up on the WD forum. John Caswell Is good at identifying old valve radios and gave me a lot of help a while back with my ancient Pye inherited from my grandfather.
Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?
Douglas Adams (HHGTTG)
Douglas Adams (HHGTTG)
- colin.hepburn
- Shed dweller
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- colin.hepburn
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- Joined: Sat Jun 02, 2007 1:24 am
- Location: Scotland Aberdeenshire
- Mike H
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#6
Are there 5 or 6 valve sockets?
You've got the IF stage and 1st audio stage triode valve.
What's missing are the 1st heptode or whatever it is frequency changer radio valve, output pentode and supply rectifier, also, if 6 valves, some sort of double-diode for the detector.
You've got the IF stage and 1st audio stage triode valve.
What's missing are the 1st heptode or whatever it is frequency changer radio valve, output pentode and supply rectifier, also, if 6 valves, some sort of double-diode for the detector.
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- colin.hepburn
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#7
Hi MikeMike H wrote:Are there 5 or 6 valve sockets?
You've got the IF stage and 1st audio stage triode valve.
What's missing are the 1st heptode or whatever it is frequency changer radio valve, output pentode and supply rectifier, also, if 6 valves, some sort of double-diode for the detector.
It's got the five sockets' Three 7 pin one 5 and one 8 pin
- Mike H
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#8
That implies the first audio triode includes the detector diodes? Or how does detector work
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- colin.hepburn
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#9
Believe that this is the schematic for it
http://www.murphy-radio.co.uk/diagrams/A46.jpg
http://www.murphy-radio.co.uk/diagrams/A46.jpg
- Mike H
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#10
A-ha so the correct triode is not HL41 then. Unless someone has modified it by adding a germanium diode for the detector, because could not get the correct triode / double-diode.
According to this:
http://www.r-type.org/addtext/add004.htm
Line-up is probably AC/TP freq. changer (V1) or AC/TH1 if it does short-wave as well (?), AC/VP1 for IF (V2), the AC/HLDD for first AF triode and detector diode, (V3, note in schematic only one is used, the other is 'shorted out' and unused) and the AC/2Pen for o/p pentode (V4). Don't know what V5 is.
According to this:
http://www.r-type.org/addtext/add004.htm
Line-up is probably AC/TP freq. changer (V1) or AC/TH1 if it does short-wave as well (?), AC/VP1 for IF (V2), the AC/HLDD for first AF triode and detector diode, (V3, note in schematic only one is used, the other is 'shorted out' and unused) and the AC/2Pen for o/p pentode (V4). Don't know what V5 is.
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- Mike H
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#11
Appendix ~ comparing schematic with its datasheet, V1 could very well be the AC/TH1
http://www.r-type.org/exhib/aaa0493.htm
http://www.r-type.org/exhib/aaa0493.htm
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- colin.hepburn
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#12
Looks like it’s a UU4/6 according to the Table of voltages I have just found
http://www.r-type.org/exhib/aaa0669.htm
http://www.r-type.org/exhib/aaa0669.htm
- Mike H
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#13
Oh right well there's the list of valves then
So all mine are wrong except AC/TH1
Whether you can get the missing ones is something else, might be worth asking Gerry at Crowthorne Tubes
So all mine are wrong except AC/TH1
Whether you can get the missing ones is something else, might be worth asking Gerry at Crowthorne Tubes
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."