On Thu, 12 May 2016 16:56:08 +0100, Jim Lesurf
wrote:

In article , Don Pearce
wrote:
On Thu, 12 May 2016 12:58:01 +0100, Jim Lesurf
wrote:

Just to let people know I've added some examples to the 'valve era'
page at

http://www.audiomisc.co.uk/Armstrong.../ValveEra.html

Jim

Just had a quick skim. Did I read that right? You have to buy and fit
your own output transformer. If that is really so, I can see why there
is no overall NFB.

Yes. A different age. You *could* choose to buy it with a speaker and
transformer from Armstrong, as some ads showed. But these were an 'optional
extra'. The chassis wasn't for someone who just wanted to buy and use a
mass produced radio/radiogram.

The approach at the time was that keen 'enthusiasts' put together their own
kit. Bear in mind that well within living memory at the time you could have
bought radios where each *valve* came in its own nicely made wooden
cabinet. These were essentially the 'high end separates' / DIY of their
day.

This was the background that lead the company into making hifi rather than
consumer radios and TVs.

FWIW I'm currently collating adverts for the period from 1932 to about 1946
to illustrate just how different to now it was back then. Different world
that people have forgotten about.

Jim

My first ever amplifier was a single ended DIY kit from Radio and TV
Components (Acton) Ltd. The input valve was a double triode (ECC83, I
think) and the PA was a 6V6 GT. The feeling of triumph when it worked
was quite something.

d

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