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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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4th Dec 2013, 6:29 pm | #1 |
Nonode
Join Date: Dec 2002
Location: Coulsdon, Surrey, UK.
Posts: 2,109
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BT/PO Loudspeaker Amplifier No.11A
Not sure if this counts as audio or testgear !
Grey Wooden box with a carrying handle containing a switched gain amplifier and loudspeaker ( solid state discrete ) Most likely an earlier version of this one : http://www.vintage-radio.net/forum/s...ad.php?t=79674 Does anyone have a schematic ? Andy |
6th Dec 2013, 10:42 pm | #2 |
Dekatron
Join Date: Jan 2003
Location: Bradford on Avon, Wiltshire, UK.
Posts: 3,301
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Re: BT/PO Loudspeaker Amplifier No.11A
There were a number of different versions of this, all known as the Amp 11A with the same spec but made by different companies(and in some cases with different circuits) for the GPO.
Any idea which one you have? I have a later one as a bench amp(Fixed Skip find!). They are not HI-FI but do have a balanced input which can be handy if you mess around with balanced lines etc.
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"Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly." |
7th Dec 2013, 4:24 pm | #3 | |
Nonode
Join Date: Dec 2002
Location: Coulsdon, Surrey, UK.
Posts: 2,109
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Re: BT/PO Loudspeaker Amplifier No.11A
Quote:
I had been meaning to knock one up from scrap bits for ages, but then this one came along 'ready made' - Shame I have to fix it first .... The case states it's a "loudspeaker amplifier No. 11A /AUD/2 Handbook No. AUD4156/2 if that helps.... Andy |
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15th Dec 2013, 12:01 am | #4 |
Hexode
Join Date: Jan 2011
Location: Westerhope, Newcastle Upon Tyne, Tyne and Wear, UK.
Posts: 407
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Re: BT/PO Loudspeaker Amplifier No.11A
Hi did you ever get the circuit diagram on the 11a amp. If not give a PM.Cheers Electronwilly.- Have the full manual.
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30th Nov 2018, 10:05 pm | #5 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
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Re: BT/PO Loudspeaker Amplifier No.11A
Thread reopened at member's request.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
30th Nov 2018, 10:15 pm | #6 |
Dekatron
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,241
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Re: BT/PO Loudspeaker Amplifier No.11A
Thank you for re-opening the thread, Graham
I have found one of these amplifiers, and would love to see a copy of the manual. Did a copy surface as a result of this thread? Many thanks in advance, Mark |