Old Escapement Radio System

Oh, BTW, Just now got your humour. :-)

-- HPT

I spend three years of my life making transistors sound like tubes in amps..

Did it too...

However, do be aware that a guitar amplifier is not a hifi ampligier, it does not 'reproduce'

it is merely the replacement for the soundbox of an acoustic guitar.

You do not build acoustic guitars out of concrete and fill them with acoustic wool to dampen resonances...

They aren't worth that much actually.

The first receiver I built that worked...stopped working when I left it on the window sill in the sun.

Understanding why started me in a career in electronics. And also made me realise thet the so called 'experts' who wrote for magazines often knew less about it than an educated 13 year old.

# In fact thats why and how I ended up there. Trying to fly RC. The hobby has a lot to answer for. I should have been a banker.

FETS and valves are voltage controlled, bipolar transistors are current controlled, however all of them have a sufficiently high output impedance to be considered 'current' devices.

Probably not these days. CB rigs go way up...

Its a piece of cake to make a fiairly broadband 5 watt transmitter..

its not THAT bad if your transmitter has the power.

Supoer regens are still used in indoor flying because they are very very simple.

Too bad you couldn't have been around and equally sharp in the 1950s. You could have made vacuum tubes sound like transistors. You would be more famous and even richer now.

I am aware of how amps work. Amps should only reproduce...says the acoustic guitar player.

No, it isn't! ...says the acoustic guitar player. It is to make an acoustic guitar sound exactly like it does acoustically but only louder. This is not easy to do, but PUTW transducers placed just behind the bridge plate (on many flat tops) does a good approximation of it.

And you do not want the amp to shift resonances, add fuzz, reverb, flange, etc. Says the acoustic guitar player.

A matched pair of new 6L6s are $30, and I have ten pairs of these and about as many 6V6s, plus some other really serious jugs. It adds up. I have enough in tubes to buy another acoustic guitar. (I found a place to put another one last night.)

Ken

I didn't desin my amps for acoustic guitar players. I had to add life an interest to deadly dull instruments like Les Pauls.

Oh yes you do. And electric guitar is not an instrument by itself..those additions are what it uses to simulate all the clever things and acoustic player does with his hands..

Madness. Get one good early stratocaster, and I'll build you an amp that clapton or hendrix would have died for.

Gimme enough time and a DSP, and I will make an amp that makes the strat sound just like an acoustic guitar too..:-)

I grew up with radio...I mean Radio, not r/c, and I marveled at the pleasure I could get from the old programs, and I had a phonograph and a bunch of 78s.

I figured that if I could ever be smart enough to understand how those two things worked, I would be smart enough to understand how everything worked. I started reading...a friend gave me an old copy of a Ham Manual.

I did learn how they worked and when a high school sophomore, I was designing and building guitar and phonograph amps. (And scaring class mates with a Van de Graaff generator 8' tall.) One day, I discovered Heathkit and my life was then fixed in a single direction.

I did try to learn everything and thought I could...until I got to thermodynamics and radio wave propagation. I decided to rely on others for the former and a Smith circular slide rule for the latter.

Well, if you had left a ten-dollar bill on the window sill in the sun, and seen that it disappeared, you might have become a banker...or thief. During the depression a lot of folks thought they were near the same thing.

Ken

That is OK. My humor is like that. My wife calls it "stealth humor." I tell her that she has no sense of any kind...any kind of humor, that is.

Ken

I am of the same opinion too having been involved in some depth with them.

Only one bank is licensed to print money, but the rest are simply a monopoly of legalised theft.

Trying to outwit them in the markets is my life's work these days..;-)

You mean you actually get sun over there? :-) oc

..the downstream effect of which is the *voltage* excursions of the output signal.

oc

Very true. Indoors would probably be the best venue of the OP (Earl Partridge) to try his vintage rig. I was referrin' to a typical outdoors flying environment with the "Model T on the freeway" analogy.

oc

Earl, I have one of the CG Venus Transmitters also. If you are interested, email me and I can send you a scan of the manual for the transmitter. There is three pages of info including a schematic and a Certificate of Compliance.

I don't have any information on the receiver.

Remove the obvious extra in my email address to reply.

Regards, Bob

Well, just don't do a too good a job...I am invested in a few of them.

Ken

For anyone interested in the more arcane aspects of how tubes work, here's a good page to bookmark-

Oh My GAWD!

I had one of these too! In the 60's...

Jus a min..... gotta find my cane...

Dave

I built a regen shortwave receiver back in the '60s using a

I read something about a Russian replacement Sovtek 6922 and a PCI audio card that used it to give the sound warmth.

Here's a motherboard that uses a tube on its audio:

-- HPT