Hey OM:

Yeah, a converter to gets the blocked cell phone bands. They making
those things in some ones garrage in Hong Kong.
Naw the top selling device would be a cell phone jammer. Flick it on
and all the cell phones within a certain radius go down.
A jammer would be highly illegal though, even a police converter
nowadays would be the same: illegal.

73 OM
de n8zu




On Jan 5, 5:17*pm, joeturn wrote:

On Dec 29 2009, 10:00*pm, Tim Shoppa wrote:

On Dec 29, 8:38*pm, Gene wrote:

Tim, thanks for the reply...analog...made in Canada....so i assume it
is a Philco-Ford , unable to find schematic , *will have to do some
reverse engineering to to figure out what cap , is what

Internally most of the good AM car radios I've met had mechanically
ganged slug tuning, although variable capacitor tuning existed too.

I once broadened the band of a Titan 4 reciever by
adding a varible capacitor with a spst it might need another *varible
capacitor with a spdt to get the other end of the spectrum.

That's great if you're comfortable adjusting the mechanics of the
radio internally to get the tracking right. Remember, you won't be
broadening the tuning range, you'll be shifting the tuning range.

Tim N3QE- Hide quoted text -

- Show quoted text -

Raypsi

You cant find the specs on a converter anymore!
I probably used one of your gadgits back in the 70s, the car am radio
was converted to cb band!

My titan 4 reciever had a trimmer just above the vfo to zero its
frequency with the dial reading!

I simply put the trimmers center point to a toggle switch that led to
two other varible capacitors and could go up or below the cb band,
tuning each to a specified value!

I would love to be able to get a converter to fill in the gaps on a
ubc 780 xlt.
A converter to allow it to start at 100 hz and go to 4 gigs will be
your next best seller without having to use the pc software- Hide quoted text -

- Show quoted text -

On Jan 8, 9:11*am, raypsi wrote:
Hey OM:

Yeah, a converter to gets the blocked cell phone bands. They making
those things in some ones garrage in Hong Kong.
Naw the top selling device would be a cell phone jammer. Flick it on
and all the cell phones within a certain radius go down.
A jammer would be highly illegal though, even a police converter
nowadays would be the same: illegal.

73 OM
de n8zu



On Jan 5, 5:17*pm, joeturn wrote:

On Dec 29 2009, 10:00*pm, Tim Shoppa wrote:

On Dec 29, 8:38*pm, Gene wrote:

Tim, thanks for the reply...analog...made in Canada....so i assume it
is a Philco-Ford , unable to find schematic , *will have to do some
reverse engineering to to figure out what cap , is what

Internally most of the good AM car radios I've met had mechanically
ganged slug tuning, although variable capacitor tuning existed too.

I once broadened the band of a Titan 4 reciever by
adding a varible capacitor with a spst it might need another *varible
capacitor with a spdt to get the other end of the spectrum.

That's great if you're comfortable adjusting the mechanics of the
radio internally to get the tracking right. Remember, you won't be
broadening the tuning range, you'll be shifting the tuning range.

Tim N3QE- Hide quoted text -

- Show quoted text -

Raypsi

You cant find the specs on a converter anymore!
I probably used one of your gadgits back in the 70s, the car am radio
was converted to cb band!

My titan 4 reciever had a trimmer just above the vfo to zero its
frequency with the dial reading!

I simply put the trimmers center point to a toggle switch that led to
two other varible capacitors and could go up or below the cb band,
tuning each to a specified value!

I would love to be able to get a converter to fill in the gaps on a
ubc 780 xlt.
A converter to allow it to start at 100 hz and go to 4 gigs will be
your next best seller without having to use the pc software- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

No the police bands are wide open they dont use digital because of the
range. They all still use analog because of its dependability!

They do use cell phones to communicate privately on digital,but theirs
still that problem of 40 kz between transmit and recieve to over come.

That only got you a dependent pimp or drug dealer.The cordless phones
are still of interest however,the scanners that can get into the
2-4gigs are too expensive for the ordinary joeI;-)

PS

The authorities/military are the only ones that have a need to jam RF
(a cell phone) but those are all ready furnished them!

http://www.sesp.com/

highlandham wrote:
99% of all the cordless phones are now digital (mostly 900MHz)
Many are of the DECT type (Digitally Enhanced Communication Technology)
Those cordless phones which are GAP compatible (even when from different
manufacturers) can be used with the same base station (unit wired to
the telephone system)

Maybe in the US they are. In the rest of the world, and many sold in the US,
use the 1.8gHz band. The low end of the US 1.9gHz band overlaps the high
end of the 1.8gHz band used elsewhere, so they can be 1.8 gHz here and
1.9 gHz there. :-)

There are some 2.4gHz cordless phones, but AFAIK they are slowly being phased
out because the poorly designed ones interfere with WiFi, and the good ones
that look for a clear channel can't function in a heavy WiFi environment.

5.8gHz phones, only legal in the Americas, are similar to their 2.4 gHz cousins
and eventually as the 5.8gHz gets taken over by 802.11n networks, they too
will disapear.

BTW, GAP phones are not always useable with other base stations. In order
to access a base station a handset must register with it, and currently that
has to be done by placing both the handset and base station in registration
mode and inserting the handset into the base station. Works in theory, but
every manufacturer uses a different base design and they contacts won't mate.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
New word I coined 12/13/09, "Sub-Wikipedia" adj, describing knowledge or
understanding, as in he has a sub-wikipedia understanding of the situation.
i.e possessing less facts or information than can be found in the Wikipedia.

We now have a 6.2 ghz cordless! Digital cell phones are only good to
reach the nearest microwave tower then then the signal is relayed!
This is most likely the way the Europeans use digital as it's no good
over a distance of 30 miles without being relayed.

The only bennifit of digital is a weak signal demanding cable or
satellite subscriptions$$$$

To amplifi the digital signal enough to be usable at greater distances
will have a domino effect on its technology of being deadly due to
exposure to microwaves to the human brain and redering one impotent!

http://www.articlesbase.com/technolo...se-413085.html

This release of harmful cellphone use will hurt the industry or do
away with it completely!!
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

The Government once conducted a study of the possibility of RF being
harmful but conviniently the results were altered!

Here's a better read for cellphone's harmful effects!

http://www.infowars.com/cell-phone-u...ful-to-unborn/

but mega biz has no feelings where loss of revenue is concerned, they
just lobby in what ever brings the biggest buxI;-)

Geoffrey S. Mendelson wrote:
BTW, GAP phones are not always useable with other base stations. In order
to access a base station a handset must register with it, and currently that
has to be done by placing both the handset and base station in registration
mode and inserting the handset into the base station. Works in theory, but
every manufacturer uses a different base design and they contacts won't mate.

There is no "inserting in the base station" during registration of a
handset with a base station. You only select some function, key-in some
number, and press some button.
My base station does not even have the facility to charge a handset,
there is a separate charger base for that.

highlandham wrote:
In Britain the police is now on a digital nation wide trunking system
,originally called Tetra ; I believe it is a Motorola system .
The Ambulance- and other public services are gradually also adopting the
system ,which eventually will be pan-european .

In the Netherlands it has been active for several years already.
There is no more police radio snooping using FM scanners anymore.

(of course this means the public cannot serve as an extra eye and ear
to the police anymore, either)

On Dec 27 2009, 3:34*pm, Gene wrote:
Season`s greetings to all...
While in England in `91, I picked up a Ford motor car radio receiver.
P21 79GB-18K810 *HA . * Two band , LW & MW .. (166 KHz - 285 KHz LW
& *666KHz *- 1500Khz MW *+/- ) .I would like to extend the LW band as
high in frequency as i can , and the MW band as low as i can in
frequency..I.F. is 465 kHz...Object : To create a beacon ( 200KHz -
400 KHz ) receiver...
Is there anyone out there that has any experience , and or ideas with
what i have in mind ?

TIA * Gene * WB7NGI

Based on the OP. Postulating some numbers!

The Long Wave band 166 to 285. That's ratio of 1:1.7
The local oscillator with an IF of 465 would be (465 + 166 = 631) to
(465 + 285 = 750) a ratio of only 1:1.18!

The Medium Wave band 666 to 1500. A ratio of 1:2.25
The local oscillator being (465 + 666 = 1131) to (465 + 1500 = 1965) a
ratio of 1:1.73.

To tune 200 to 400 khz. is a ratio of (at least) 1:2. And retaining
an IF of 465 would require, say, a local oscillator variation from
(465 + 200 = 665) to (465 + 400 = 865) a ratio of 865/665 or 1:1.3

However those 200 to 400 kilohertz aircraft beacon radios, covering
specifically 200 to 400 are quite often on eBay!

Another alternative would be a 190 to 550 kilo hertz ARC-5/BC453
'Command radio'. Those have 12 volt tubes that can easily be rewired
from 24 to 12 volt operation.

Another quicker alternative would be some form of small solid state
converter tuned or fixed into the Med. Wave band.