tech question on old walkie talkies
 

Hi everyone;

Perhaps someone out here can answer a question. Back in the 1960's I
got my first pair of walkie talkies (100mw, with transmit channel 14).
Anyway, I recall that they seemed to receive all the channels at the
same time (23 at the time),although equipted to only transmit on 14.
That is, I could hear my friends on 14, plus seem to hear truckers on
19, and anyone else in the neighborhood no matter what channel they
were on! This was not bleed-over, but actualy reception on all the
channels of the CB band.

I realize that crystal control on future walkie talkies and CB's at
the time solved that (before PLL), but can someone tell me what a
person would need today to receive all the CB channels at once? I
think it's rather a neat feature, to be able to monitor all 40
channels at the same time, like my small 100mw walkie talkies seemed
to receive all 23 back then. Just a thought! Thanks!

-Stephen

The receivers were a rather broad tuned (front end) circuit, only the
transmitter was crystal controlled. Some of the receiver circuits were
even regnerative type layouts. With minimal front end selection, you
pretty much hear anything for quite a spectral distance on each side of
the tune peak.

cheers
skipp

www.radiowrench.com/sonic

remember the old sonic server? well it's moved to the above url.

Stephen wrote:
: Hi everyone;

: Perhaps someone out here can answer a question. Back in the 1960's I
: got my first pair of walkie talkies (100mw, with transmit channel 14).
: Anyway, I recall that they seemed to receive all the channels at the
: same time (23 at the time),although equipted to only transmit on 14.
: That is, I could hear my friends on 14, plus seem to hear truckers on
: 19, and anyone else in the neighborhood no matter what channel they
: were on! This was not bleed-over, but actualy reception on all the
: channels of the CB band.

: I realize that crystal control on future walkie talkies and CB's at
: the time solved that (before PLL), but can someone tell me what a
: person would need today to receive all the CB channels at once? I
: think it's rather a neat feature, to be able to monitor all 40
: channels at the same time, like my small 100mw walkie talkies seemed
: to receive all 23 back then. Just a thought! Thanks!

: -Stephen

Hello Skip:

Great Web Site, good seeing ya out here.

Carry on...............

Jay in the Mojave


Skipp is still around wrote:
The receivers were a rather broad tuned (front end) circuit, only the
transmitter was crystal controlled. Some of the receiver circuits were
even regnerative type layouts. With minimal front end selection, you
pretty much hear anything for quite a spectral distance on each side of
the tune peak.

cheers
skipp

www.radiowrench.com/sonic

remember the old sonic server? well it's moved to the above url.

Stephen wrote:
: Hi everyone;

: Perhaps someone out here can answer a question. Back in the 1960's I
: got my first pair of walkie talkies (100mw, with transmit channel 14).
: Anyway, I recall that they seemed to receive all the channels at the
: same time (23 at the time),although equipted to only transmit on 14.
: That is, I could hear my friends on 14, plus seem to hear truckers on
: 19, and anyone else in the neighborhood no matter what channel they
: were on! This was not bleed-over, but actualy reception on all the
: channels of the CB band.

: I realize that crystal control on future walkie talkies and CB's at
: the time solved that (before PLL), but can someone tell me what a
: person would need today to receive all the CB channels at once? I
: think it's rather a neat feature, to be able to monitor all 40
: channels at the same time, like my small 100mw walkie talkies seemed
: to receive all 23 back then. Just a thought! Thanks!

: -Stephen

On 26 Oct 2004 14:35:37 -0700, (Stephen) wrote
in :

Hi everyone;

Perhaps someone out here can answer a question. Back in the 1960's I
got my first pair of walkie talkies (100mw, with transmit channel 14).
Anyway, I recall that they seemed to receive all the channels at the
same time (23 at the time),although equipted to only transmit on 14.
That is, I could hear my friends on 14, plus seem to hear truckers on
19, and anyone else in the neighborhood no matter what channel they
were on! This was not bleed-over, but actualy reception on all the
channels of the CB band.

I realize that crystal control on future walkie talkies and CB's at
the time solved that (before PLL), but can someone tell me what a
person would need today to receive all the CB channels at once? I
think it's rather a neat feature, to be able to monitor all 40
channels at the same time, like my small 100mw walkie talkies seemed
to receive all 23 back then. Just a thought! Thanks!

-Stephen


There are a few ways to receive all 40 channels at once. First, you
can use 40 radios. Second, you can broaden the center bandwidth to
cover the entire band, noise and all. Third, you can buy a rather
expensive spectrum analyzer.

If you just want to scan the channels like a regular police scanner, a
few models will cover freqs down to 25 MHz. I've also heard that there
has been a couple scanning CB radios but I have never seen one.





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Ok, that answers the question. Thanks a lot. I sure wish I had kept
those old walkie talkies, just to monitor all channels!
-Stephen

Thanks, Frank. Using 40 radios at the same time might be nice! Haha.

Now that I think about it, with all the chatter and skip out there, it
might be worse than in the 1960's, and I might end up wishing for a
more selective reception (one channel, or maybe none!). Thanks!

Back in the CB Heyday... small monitor boxes were made that covered the cb
band. Pretty much doing what you're asking us about. I have seen them made
in a few different brand names, they simply had a speaker, volume knob and
an antenna jack. Most were 9 volt battery operation.

No one is making them anymore, but you might put the search word out or
look on Ebay.

chow for now
skipp

www.radiowrench.com/siltronix

The original siltronix web pages now live at the above url.

: Stephen wrote:
: Ok, that answers the question. Thanks a lot. I sure wish I had kept
: those old walkie talkies, just to monitor all channels!
: -Stephen

Hi Jay,

Good to hear from you, yes it has been a while. I check the
group every so often, but it's been mostly a bunch of poop
postings. Some day we'll have to hook up on the air for
a chat. I can talk to my friends down your way on 40 most
any weekend when I have some radio time. I'm sure we can
find another mutual band that allows a usable connection.

I've been pretty busy and enjoying life...

chow for now
skipp

www.radiowrench.com/sonic
www.radiowrench.com/siltronix

ps: send me anything you'd like to see over on the sonic or siltronix web
pages.

c'ya

: Jay in the Mojave wrote:
: Hello Skip:
: Great Web Site, good seeing ya out here.
: Carry on...............

: Jay in the Mojave

: Frank Gilliland wrote:
: There are a few ways to receive all 40 channels at once. First, you
: can use 40 radios. Second, you can broaden the center bandwidth to
: cover the entire band, noise and all. Third, you can buy a rather
: expensive spectrum analyzer.

: If you just want to scan the channels like a regular police scanner, a
: few models will cover freqs down to 25 MHz. I've also heard that there
: has been a couple scanning CB radios but I have never seen one.

Hi Frank, good to see you're still around.

back later...
"chow for now"
skipp

On 26 Oct 2004 14:35:37 -0700, (Stephen)
wrote:


Anyway, I recall that they seemed to receive all the channels at the
same time (23 at the time),although equipted to only transmit on 14.

Those walkie talkies were never intentionally made to receive all 23
channels. The quality/selectivity was poor enough that you could still
hear stations other than the desired channel 14.

Yes, and as a young child with a pair of those back then, I couldn't
understand why trucker I heard on channel 19 (as he was nearby) could
not hear me! Gee, I thought all truckers were rude CB-ers!