|
Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
|
Thread Tools |
21st Aug 2007, 8:54 pm | #1 |
Retired Dormant Member
Join Date: Jun 2007
Location: Holmfirth, West Yorkshire, UK.
Posts: 29
|
Air Ministry Amplifier A.1368
Hi, I have just purchased an Air Ministry Radio Amplifier A.1368 and have very little information on it. I am led to believe it was used in Lancasters in conjunction with radios other than the T1154/R1155. Can anyone tell me any more about this item please?
Dave |
22nd Aug 2007, 10:52 pm | #2 |
Heptode
Join Date: Jan 2003
Location: Tewkesbury, Gloucestershire, UK.
Posts: 693
|
Re: Air Ministry Amplifier A.1368
Dave,
From the photo it looks very much like a simplified version of the A1134, minus the three position switch. It still seemds to require 120V/2V battery supplies. Does it use the same QPP output stage I wonder? Keith
__________________
Keith Yates - G3XGW VMARS & BVWS member http://www.tibblestone.com/oldradios/Old_Radios.htm |
23rd Aug 2007, 8:57 am | #3 |
Dekatron
Join Date: Aug 2003
Location: near Reading (and sometimes Torquay)
Posts: 3,099
|
Re: Air Ministry Amplifier A.1368
I have not encountered this amplifier before but externally it looks identical to A1219 which was the multi-seat adaption for the TR1133 VHF set.
A photo of the insides may help further identify it. |
23rd Aug 2007, 10:28 pm | #4 |
Retired Dormant Member
Join Date: Jun 2007
Location: Holmfirth, West Yorkshire, UK.
Posts: 29
|
Re: Air Ministry Amplifier A.1368
Hi, Thanks for the replies, I shall examine it a little closer and post some more pictures soon. Thanks once again guys. Regards Dave
|
15th Sep 2007, 3:23 pm | #5 |
Retired Dormant Member
Join Date: Jun 2007
Location: Holmfirth, West Yorkshire, UK.
Posts: 29
|
Re: Air Ministry Amplifier A.1368
Hi, I have now taken some photos of the inside of this A1368 Amplifier I have, it would be nice if anyone can throw any light on what it is, when and where it was used plus any further information on it. Thanks Dave
|
16th Sep 2007, 3:36 pm | #6 |
Heptode
Join Date: Jan 2003
Location: Tewkesbury, Gloucestershire, UK.
Posts: 693
|
Re: Air Ministry Amplifier A.1368
Dave,
As I suspected, internally it is very similar to the A1134 intercom amplifier as used on the Lancaster, etc but minus the complicated switching. It's basically a triode mic amplifier followed by a double pentode in "quiescent push-pull" (presumably for battery economy), all transformer coupled. There is some information here: http://home2.btconnect.com/gmb/airequip.htm
__________________
Keith Yates - G3XGW VMARS & BVWS member http://www.tibblestone.com/oldradios/Old_Radios.htm |
17th Sep 2007, 7:57 pm | #7 |
Retired Dormant Member
Join Date: Jun 2007
Location: Holmfirth, West Yorkshire, UK.
Posts: 29
|
Re: Air Ministry Amplifier A.1368
Hi Keith, Many thanks for the info. Does anyone know where this Amp would have been used and what aircraft would it have been used in? Dave.
|