RST Engineering wrote:
6V6 was the quintessential beam power audio output tube of the 1940s through
the 1960s. You can generally "read" the missing numbers if there is
anything left of the imprint by gently rubbing the tube on your hair. THe
oil from your hair will stick to what is left of the printing and make it
readable for a short time. You might take a permanent marker if and when
you finally read the number and mark the tube.

Thanks, I'll give it a try.

As has been alluded to in several posts, you are not limited to the exact
tube that the original project had in it. For example, the 6U8 was the
VHF/UHF RF oscillator/mixer of choice in thousands of designs. However, a
6J6 oscillator with a 6BE6 mixer will work every bit as good if you aren't
fussy about VHF reception. There are dozens of tricks you can play with mix
& match tube lineups, some better than others.

TJ Linday says as much in the Impoverished Radio Experimenter. Thing
is, he was scant on details. I wrote them about my project, and I'm
hoping they'll have some ideas.


Ralph

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

I was in Powell's Technical Books the other day, they had several from
the '50s and '60s.

This link will get you several listings (and I'll get a kickback if you
buy one!). I already grabbed the 1944 issue (thank you thank you thank
you for making me look!).

http://www.powells.com/partner/30696...RRL%20Handbook

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google? See http://cfaj.freeshell.org/google/

"Applied Control Theory for Embedded Systems" came out in April.
See details at http://www.wescottdesign.com/actfes/actfes.html

Here is a site with lots of FREE books dealing with tube design. There
are old ARRL and Orr radio handbooks as well.

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

The files are huge so you better have a high-speed (not dial-up)
internet connection.

Have fun - Roger

wrote:
Here is a site with lots of FREE books dealing with tube design. There
are old ARRL and Orr radio handbooks as well.

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

The files are huge so you better have a high-speed (not dial-up)
internet connection.

Thanks, but I have two problems - I'm stuck using dialup, and most of
these books seem over my head. Interesting, nonetheless.

Ralph

"julian814" ) writes:
wrote:
Here is a site with lots of FREE books dealing with tube design. There
are old ARRL and Orr radio handbooks as well.

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

The files are huge so you better have a high-speed (not dial-up)
internet connection.

Thanks, but I have two problems - I'm stuck using dialup, and most of
these books seem over my head. Interesting, nonetheless.

Unless you pay by the hour, it's doable with dialup. Do it late at
night so there's no disturbances, and hopefully less traffic. Be
selective, figuring out what you might find useful before downloading.

I have dialup, and I grabbed some of those books last year, using
this same method. It took time, but if you plan it right, it doesn't
get in the way. Just don't plan to be able to do much else at the
same time as the download.

Unfortunately, while I did record the times it took to download those
books I did download, I have no idea where I put that list.

Of those books, the 15th edition of THe Radio Handbook is likely
the best choice, since it's the most recent of the handbooks they
have there. Most of the books are more text books, and the 1941 ARRL
Handbook is likely going to use older tubes than you have, same with
the 1940 Radio Handbook.

Michael VE2BVW

Michael Black wrote:
"julian814" ) writes:
wrote:
Here is a site with lots of FREE books dealing with tube design. There
are old ARRL and Orr radio handbooks as well.

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

The files are huge so you better have a high-speed (not dial-up)
internet connection.

Thanks, but I have two problems - I'm stuck using dialup, and most of
these books seem over my head. Interesting, nonetheless.

Unless you pay by the hour, it's doable with dialup. Do it late at
night so there's no disturbances, and hopefully less traffic. Be
selective, figuring out what you might find useful before downloading.

I have dialup, and I grabbed some of those books last year, using
this same method. It took time, but if you plan it right, it doesn't
get in the way. Just don't plan to be able to do much else at the
same time as the download.

Unfortunately, while I did record the times it took to download those
books I did download, I have no idea where I put that list.

Of those books, the 15th edition of THe Radio Handbook is likely
the best choice, since it's the most recent of the handbooks they
have there. Most of the books are more text books, and the 1941 ARRL
Handbook is likely going to use older tubes than you have, same with
the 1940 Radio Handbook.

Thanks, I'll give it a go. I work from 4 pm to midnight weekdays, so I
think I'll try this again tonight after work.


Ralph

Well, after much hair pulling and gnashing of teeth, I managed to
download the 15th edition of Radio Handbook last night. No straight
receivers that use tubes, though. Going to have to look at the math
section to see if there's some way I can work up a schematic of my own.
Thing is, math isn't my strong suit.

Also going to have a look at some of the older books. If worse comes to
worst, I know of a few places online where I can buy the tube that are
in the schematics I do have.


Ralph

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.

Not sure whether this is what you're looking for but I found two sites
that seem to contain most of the tube data that was in the ARRL Handbook:

http://www.nj7p.org/Tube4.php
http://tdsl.duncanamps.com/tubesearch.php


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

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.

Not sure whether this is what you're looking for but I found two sites
that seem to contain most of the tube data that was in the ARRL Handbook:

http://www.nj7p.org/Tube4.php
http://tdsl.duncanamps.com/tubesearch.php

Well, these should definitely help me identify which tubes are the most
useful, especially the first link. It's a start. I could use some
schematics, though.


Ralph

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?

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.

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