Doug Smith W9WI wrote:
julian814 wrote:
All right, I'm hoping someone here can clue me into finding the one(s)
I want. What I need is a handbook that has schematics for tube
equipment circa the 1960's. I have a boxful of tubes from television
sets from that era, and I was hoping I could put together a receiver
from some of them. I do have the first volume of Impoverished Radio
Experimenter, which talks about using "newer" tubes in older
schematics, but the scant few Lindsay talks about aren't among the
tubes in my box.

How complex of a receiver are you looking to build?

Nothing too complex, two tubes or so. What I want to build is something
that looks like it's from a 1950's Cold War era post apocalyptic story.
I definitely want to use tubes, and I have some headphones from that
era as well. The receiver has to be able to drive the headphones. They
are NOT crystal headphones.


There are a PILE of simple tube circuits on
http://www.intio.or.jp/jf10zl/index.html .

Most of them use Japanese tubes (the site is in Japan, after allg) but
I would suggest in many cases you can figure out what U.S. tubes are
similar.

Fascinating, but I didn't see anything close to what I'm looking for.
Thanks anyway.


Ralph

julian814 wrote:
Doug Smith W9WI wrote:
julian814 wrote:
All right, I'm hoping someone here can clue me into finding the one(s)
I want. What I need is a handbook that has schematics for tube
equipment circa the 1960's. I have a boxful of tubes from television
sets from that era, and I was hoping I could put together a receiver
from some of them. I do have the first volume of Impoverished Radio
Experimenter, which talks about using "newer" tubes in older
schematics, but the scant few Lindsay talks about aren't among the
tubes in my box.
How complex of a receiver are you looking to build?

Nothing too complex, two tubes or so. What I want to build is something
that looks like it's from a 1950's Cold War era post apocalyptic story.
I definitely want to use tubes, and I have some headphones from that
era as well. The receiver has to be able to drive the headphones. They
are NOT crystal headphones.

There are a PILE of simple tube circuits on
http://www.intio.or.jp/jf10zl/index.html .

Most of them use Japanese tubes (the site is in Japan, after allg) but
I would suggest in many cases you can figure out what U.S. tubes are
similar.

Fascinating, but I didn't see anything close to what I'm looking for.
Thanks anyway.


Ralph

I don't recall the url but I remember a 2-3 tube receiver from the 40's
that might be what you want. It was a simple superhet with a
regenerative detector. Used a 6k8 as the converter and a 6c8g as the
detector / audio. It drove a pair of magnetic phones. The set used two
plugin coils, one for the antenna circuit and one for the oscillator.
Each antenna coil served double duty as the oscillator coil on the next
higher band (moved the antenna coil from the antenna coil socket to the
oscillator coil socket and put a new coil in the antenna coil socket to
change bands). There is a variation that added a 6sj7 as the detector
and the other half of the 6c8 became a bfo.

This first appeared in Feb 1941 QST. The details are on the web
someplace, google for it.

ken scharf ) writes:
julian814 wrote:
Doug Smith W9WI wrote:
julian814 wrote:
All right, I'm hoping someone here can clue me into finding the one(s)
I want. What I need is a handbook that has schematics for tube
equipment circa the 1960's. I have a boxful of tubes from television
sets from that era, and I was hoping I could put together a receiver
from some of them. I do have the first volume of Impoverished Radio
Experimenter, which talks about using "newer" tubes in older
schematics, but the scant few Lindsay talks about aren't among the
tubes in my box.
How complex of a receiver are you looking to build?

Nothing too complex, two tubes or so. What I want to build is something
that looks like it's from a 1950's Cold War era post apocalyptic story.
I definitely want to use tubes, and I have some headphones from that
era as well. The receiver has to be able to drive the headphones. They
are NOT crystal headphones.

There are a PILE of simple tube circuits on
http://www.intio.or.jp/jf10zl/index.html .

Most of them use Japanese tubes (the site is in Japan, after allg) but
I would suggest in many cases you can figure out what U.S. tubes are
similar.

Fascinating, but I didn't see anything close to what I'm looking for.
Thanks anyway.


Ralph

I don't recall the url but I remember a 2-3 tube receiver from the 40's
that might be what you want. It was a simple superhet with a
regenerative detector. Used a 6k8 as the converter and a 6c8g as the
detector / audio.

They were called "supergainers" and apparently Frank Jones, of later
VHF fame, was a big proponent of them in the thirties.

The earlier Radio Handbook on that webpage someone posted about would
have them, the 1936 version or whatever. I didn't suggest downloading
that one since I had the impression the tubes available to the original
poster were miniature, and the book predates those.

Michael VE2BVW
k

Michael Black wrote:
ken scharf ) writes:
I don't recall the url but I remember a 2-3 tube receiver from the 40's
that might be what you want. It was a simple superhet with a
regenerative detector. Used a 6k8 as the converter and a 6c8g as the
detector / audio.

They were called "supergainers" and apparently Frank Jones, of later
VHF fame, was a big proponent of them in the thirties.

The earlier Radio Handbook on that webpage someone posted about would
have them, the 1936 version or whatever. I didn't suggest downloading
that one since I had the impression the tubes available to the original
poster were miniature, and the book predates those.

Thanks, Mike, Ken. I'll have to take a look. I did manage to download
some of the files on designing circuits with tubes, and with the online
tube manuals I might be able to figure out something on my own. Still,
if anyone can think of where I can find something already made up that
I can use, I'd appreciate it.


Ralph

julian814 wrote:
How complex of a receiver are you looking to build?

Nothing too complex, two tubes or so. What I want to build is something
that looks like it's from a 1950's Cold War era post apocalyptic story.
I definitely want to use tubes, and I have some headphones from that
era as well. The receiver has to be able to drive the headphones. They
are NOT crystal headphones.

There are a PILE of simple tube circuits on
http://www.intio.or.jp/jf10zl/index.html .

Most of them use Japanese tubes (the site is in Japan, after allg) but
I would suggest in many cases you can figure out what U.S. tubes are
similar.

Fascinating, but I didn't see anything close to what I'm looking for.
Thanks anyway.

I would suggest this one ( http://www.intio.or.jp/jf10zl/17ew8.htm )
would be a good starting point. It should work with most standard
double-triodes (12AX7, 12AT7, 12AU7, 12SN7, etc.) or two single triodes.
(6C4, 6J5, etc.).

This one ( http://www.intio.or.jp/jf10zl/12au70v1.htm ) could also be
adapted - use more than 12 volts on the plates and put a ~5k:8-ohm
transformer in the plate of the second tube (instead of the R-C network)
and it should do what you're trying to do.


--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

You can download free a long list of archaic technical books, including
a number of ARRL Handbooks, at the following URL:

http://www.pmillett.com/tecnical_books_online.htm


julian814 wrote:
All right, I'm hoping someone here can clue me into finding the one(s)
I want. What I need is a handbook that has schematics for tube
equipment circa the 1960's. I have a boxful of tubes from television
sets from that era, and I was hoping I could put together a receiver
from some of them. I do have the first volume of Impoverished Radio
Experimenter, which talks about using "newer" tubes in older
schematics, but the scant few Lindsay talks about aren't among the
tubes in my box.

I've found a very good used book search engine, but unless I have a
better idea of what to look for, It's going to be hit and miss. Any
help would be greatly appreciated.


Ralph

wrote:


You can download free a long list of archaic technical books, including
a number of ARRL Handbooks, at the following URL:

http://www.pmillett.com/tecnical_books_online.htm

Some more here, plus some QEX

http://info.awmn.net/users/images/st...y/RadioTheory/

Regards,

Mike Monett

Today, I am reminded that Google is my friend. After much digging and
prodding, I found what I was looking for. It seems the National SW-54
receiver is as close to what I want as possible without me having to do
math. It dates back to the 50's, uses tubes, (in fact, I already have
three of the five in it) covers a good amount of the SW band, and will
drive either my 2000 ohm headphones or a 4" speaker. BAMA had the
manual, but it wouldn't give it up, so I had to go to the mirror site
to get it. Everything I need is in it - schematics, parts list,
pictures of the assembled receiver. Not exactly the ideal radio for a
first try, but nothing good ever came easy, did it? ;-)

Thanks again to everyone who offered advice and suggestions. I'll be
sure to post when I have it together and let everyone know how I made
out.

Time to scrounge for parts.


Ralph

julian814 wrote:
Today, I am reminded that Google is my friend. After much digging and
prodding, I found what I was looking for. It seems the National SW-54
receiver is as close to what I want as possible without me having to do
math. It dates back to the 50's, uses tubes, (in fact, I already have
three of the five in it) covers a good amount of the SW band, and will
drive either my 2000 ohm headphones or a 4" speaker. BAMA had the
manual, but it wouldn't give it up, so I had to go to the mirror site
to get it. Everything I need is in it - schematics, parts list,
pictures of the assembled receiver. Not exactly the ideal radio for a
first try, but nothing good ever came easy, did it? ;-)

Thanks again to everyone who offered advice and suggestions. I'll be
sure to post when I have it together and let everyone know how I made
out.

Time to scrounge for parts.


Ralph

Ocean State electronics has EXACT replacement coil forms for the beast.
(sockets are another story!) They have NORMAL socket type plug in coil
forms too. (the national coil forms have different pin spacing than
standard tube socket type coils).

julian814 wrote:
Today, I am reminded that Google is my friend. After much digging and
prodding, I found what I was looking for. It seems the National SW-54
receiver is as close to what I want as possible without me having to do
math. It dates back to the 50's, uses tubes, (in fact, I already have
three of the five in it) covers a good amount of the SW band, and will
drive either my 2000 ohm headphones or a 4" speaker. BAMA had the
manual, but it wouldn't give it up, so I had to go to the mirror site
to get it. Everything I need is in it - schematics, parts list,
pictures of the assembled receiver. Not exactly the ideal radio for a
first try, but nothing good ever came easy, did it? ;-)

Thanks again to everyone who offered advice and suggestions. I'll be
sure to post when I have it together and let everyone know how I made
out.

Time to scrounge for parts.


Ralph

OPPS, I confused the sw-54 with the sw3-5 series.
This one is a "modern" superhet. Do you have the IF transformers, band
switch and coils?

I have a complete band switch and coil assembly from an old Lafayette
short wave receiver. It is a 4 band assembly with rf, osc, and mixer
coils intended for use with a 3 gang 365pf/section tuning capacitor.
I was thinking of using this in some project (that never happened), but
it sounds like just what you want. The coils have slug tuned tracking
adjustments, and the oscillator and mixer coils also have trimmer
capacitor tracking too.

If you can use this let me know.