Yukio YANO ) writes:
Clayton wrote:
Hi,
I am looking for some plans for a simple(beginners) 20 Meter SSB Tube
Transceiver and was wondering if somebody had any good plans or web
site they could point me to?

Any help would be greatly Appreciated
Thank You

Why not re-work a 10 Meter(CB) SSB), Re-Tune the Rx. Front-end for 20
Meters, Use the 10 meter Tx as an Exciter to drive a 20 Meter Final.

This way 85% of the design work has already been done and tested !

Are you out to prove a point, or want a working rig ?? Tubes have been
obsolete for fifty years !! Why else would you attempt to build a
Sideband rig using parts that have been out of production for several
generations. If you are going to wind coils and Rf transformers why not
wind them for transistor stages. Transistor Rigs (CB) are CHEAP. Tube
type rigs have long been relegated to the Scrap Heap.

THat's a bit of a stretch, fifty years ago transistors were hardly capable
of replacing tubes. Yes, there was solid state equipment coming off
the line by 1957, but much of it wasn't particularly great, designers
not having figured out how to make good transistor equipment.

Even forty years ago, tubes were still going strong.

Now if you'd said tubes were obsolete thirty years ago, that's far
more likely to get agreement. By then solid state had risen
sufficiently that no new tube based equipment was being introduced
(well, the exception being the output stage or stages).

There is all kinds of old parts lying around, waiting for that
day when someone would finally build that "dream rig". Of course
nodoby is going to be able to buy tube type components at their
local parts emporium, even if the local parts emporium still
exists), but then even forty or fifty years ago those who
had to buy off the shelf just like in the magazine article
often suffered, since they had to rely on what the magazine
article said and had to rely on what they could get at the
store.

But anyone who shows a certain level of capability can scrounge
parts and make do with what they can find, so it's not particularly
that big a deal that someone wants to build with tubes. IN a lot
of cases, the parts are just waiting to be used, since others
have declared them "obsolete".

It's kind of interesting that you dismiss building with tubes,
but then turn around and suggest the solution is to modify a
CB rig. Not that there's anything wrong with that, but someone
wouldn't be building in the first place if the "wanted something
already tested".

Michael VE2BVW