On Mon, 16 Jan 2017 21:47:18 -0500, "Mr. Luddite"
wrote:

On 1/16/2017 9:45 PM, wrote:
On Monday, September 25, 1995 at 3:00:00 AM UTC-4, MikeT1946 wrote:
I just bought a boat that had been equipped with Loran, VHF, and Citizen's
Band (CB). The former owner kept the CB. So I now have 3 antennas, and 2
things to hook them up to.

The question is, can I hook the VHF up to what had been used as the CB
antenna? They're both white plastic whip antennas, and I have no idea
whether they're electronically different in any way or not.

Radio experts? Thanks...


-- Mike



Wow. 1995. Back when rec.boats was about boats.

Somebody been poking around in the google groups again?

On Monday, January 16, 2017 at 9:48:58 PM UTC-6, wrote:
On Mon, 16 Jan 2017 21:47:18 -0500, "Mr. Luddite"
wrote:

On 1/16/2017 9:45 PM, wrote:
On Monday, September 25, 1995 at 3:00:00 AM UTC-4, MikeT1946 wrote:
I just bought a boat that had been equipped with Loran, VHF, and Citizen's
Band (CB). The former owner kept the CB. So I now have 3 antennas, and 2
things to hook them up to.

The question is, can I hook the VHF up to what had been used as the CB
antenna? They're both white plastic whip antennas, and I have no idea
whether they're electronically different in any way or not.

Radio experts? Thanks...


-- Mike



Wow. 1995. Back when rec.boats was about boats.

Somebody been poking around in the google groups again?

Not me but I will if you want. LOL

On Mon, 16 Jan 2017 20:18:47 -0800 (PST), Tim
wrote:

On Monday, January 16, 2017 at 9:48:58 PM UTC-6, wrote:
On Mon, 16 Jan 2017 21:47:18 -0500, "Mr. Luddite"
wrote:

On 1/16/2017 9:45 PM, wrote:
On Monday, September 25, 1995 at 3:00:00 AM UTC-4, MikeT1946 wrote:
I just bought a boat that had been equipped with Loran, VHF, and Citizen's
Band (CB). The former owner kept the CB. So I now have 3 antennas, and 2
things to hook them up to.

The question is, can I hook the VHF up to what had been used as the CB
antenna? They're both white plastic whip antennas, and I have no idea
whether they're electronically different in any way or not.

Radio experts? Thanks...


-- Mike



Wow. 1995. Back when rec.boats was about boats.

Somebody been poking around in the google groups again?

Not me but I will if you want. LOL

That seems to be where these 22 year old posts come from
Over on the home repair group the homeowner web seems to be famous for
it.

I have a uniden CB radio (new) and have an existing larsen wb vhf radio already on my truck. Will this antenna work with my new radio.
Derek

On 11/27/2018 5:22 PM, wrote:

I have a uniden CB radio (new) and have an existing larsen wb vhf radio already on my truck. Will this antenna work with my new radio.
Derek


Can't determine without knowing what freq range the truck antenna is
"cut" for. There are two VHF bands, low-band VHF (49-108 MHz),
high-band VHF (169-216 MHz). Marine radios operate in the high band.

Generally it will receive ok but transmit range may be limited due to
high standing wave ratio (SWR).

Even a marine VHF antenna should be tweaked in terms of length to
minimize SWR in the middle of the radio's freq range.

On Tuesday, November 27, 2018 at 4:47:49 PM UTC-6, Mr. Luddite wrote:
On 11/27/2018 5:22 PM, wrote:

I have a uniden CB radio (new) and have an existing larsen wb vhf radio already on my truck. Will this antenna work with my new radio.
Derek


Can't determine without knowing what freq range the truck antenna is
"cut" for. There are two VHF bands, low-band VHF (49-108 MHz),
high-band VHF (169-216 MHz). Marine radios operate in the high band.

Generally it will receive ok but transmit range may be limited due to
high standing wave ratio (SWR).

Even a marine VHF antenna should be tweaked in terms of length to
minimize SWR in the middle of the radio's freq range.

I remember in the 'craze' the SWR meter was pretty popular, where you could tune a potentiometer to match the antennae to the radio for maximum efficiency.

On Tue, 27 Nov 2018 17:47:44 -0500, "Mr. Luddite"
wrote:

On 11/27/2018 5:22 PM, wrote:

I have a uniden CB radio (new) and have an existing larsen wb vhf radio already on my truck. Will this antenna work with my new radio.
Derek


Can't determine without knowing what freq range the truck antenna is
"cut" for. There are two VHF bands, low-band VHF (49-108 MHz),
high-band VHF (169-216 MHz). Marine radios operate in the high band.

Generally it will receive ok but transmit range may be limited due to
high standing wave ratio (SWR).

Even a marine VHF antenna should be tweaked in terms of length to
minimize SWR in the middle of the radio's freq range.


He is talking about CB (27mz) so that is over twice the wavelength of
the lowest frequency VHF.
SWR is really going to be ugly but since they are capped at 5w,
(usually more like 4.5) I doubt the magic smoke comes out but he won't
be "getting out" far either.

If his "truck" is a real one (breaker good buddy size) and he has 8-9'
from mirror to mirror the best antenna is the co phasers you see on
big rigs. Otherwise it is hard to beat a bottom coil loaded ~48"
antenna right in the center of the roof. That is what I had on my van
but you had to remember to take off the vertical when you went into a
parking garage. ;-)

On 11/27/2018 7:36 PM, wrote:
On Tue, 27 Nov 2018 17:47:44 -0500, "Mr. Luddite"
wrote:

On 11/27/2018 5:22 PM, wrote:

I have a uniden CB radio (new) and have an existing larsen wb vhf radio already on my truck. Will this antenna work with my new radio.
Derek


Can't determine without knowing what freq range the truck antenna is
"cut" for. There are two VHF bands, low-band VHF (49-108 MHz),
high-band VHF (169-216 MHz). Marine radios operate in the high band.

Generally it will receive ok but transmit range may be limited due to
high standing wave ratio (SWR).

Even a marine VHF antenna should be tweaked in terms of length to
minimize SWR in the middle of the radio's freq range.


He is talking about CB (27mz) so that is over twice the wavelength of
the lowest frequency VHF.
SWR is really going to be ugly but since they are capped at 5w,
(usually more like 4.5) I doubt the magic smoke comes out but he won't
be "getting out" far either.

If his "truck" is a real one (breaker good buddy size) and he has 8-9'
from mirror to mirror the best antenna is the co phasers you see on
big rigs. Otherwise it is hard to beat a bottom coil loaded ~48"
antenna right in the center of the roof. That is what I had on my van
but you had to remember to take off the vertical when you went into a
parking garage. ;-)



I completely missed that it was a CB radio he was talking about.
Thought he was talking about a new VHF Marine radio. But the antenna
issues remain the same. For max range whatever antenna he uses needs to
be of the proper length. At 27 MHz a full wavelength is about 103
inches. A half wave antenna would be about 51.5 inches long and
aquarter wave length antenna would therefore be about 25.75
inches.

If really anal about these things, an SWR meter should then used to trim
the antenna length to the lowest SWR on channel 20 (mid-range).

I have an old SWR meter from the CB craze years that I never use anymore
but for some reason it's one of those things I just can't throw away.

On Tue, 27 Nov 2018 14:22:45 -0800 (PST),
wrote:

I have a uniden CB radio (new) and have an existing larsen wb vhf radio already on my truck. Will this antenna work with my new radio.
Derek

Short answer, no. They are tuned for entirely different frequencies.
The receiver might work but you are really stressing the transmitter.
Children's band antennas should be cheap, especially if you can find a
used one. My guess, most got thrown out with the leisure suits and
bell bottoms.
Try Ebay