The Elusive roof mounted Stryker SR-A10

[niceguy71]

who is "it", I can tell you we usually used 3/4 not 3/8, there's no way that UHF mount will come up thru a 3/8 inch hole I've also done several ham installs with the same mount and unless my memory has left universe I'm almost sure it was 3/4 to get that mount thru there.

the "it" was the Stryker installation manual ....I was reading the Stryker installation manual on line a few months ago and thought it was a 3/8 inch hole????, the piece that comes up through the roof is small.... then the other piece has the treads for the antenna to screw on it.... I believe that's 3/4" on the outside ... but I thought???? that 3/4" piece is hollow and screws onto the piece that comes through the roof... that's what I thought... I could be wrong

in this picture ( it;s all together) but you can see the rubber that is under the roof... and that metal piece on it in the picture is threaded inside and outside... inside to screw on the piece the sticks up through the roof.. the outside treads let the antenna screw on it?

I may have remembered 3/8" hole wrong, as I looked for the instructions again and couldn't find them tonight? so maybe I read it wrong.

 

[niceguy71]

I'll be using the right angle bulkhead mount coaxial cable I bought on Amazon. It seats against the rubber gasket nicely on the Stryker.
I have to drill a 5/8" hole on the roof, then adjust the depth of the SO239 connector for optimum mounting. Easy to do since there is a backer nut and and external ring nut. I'll apply some sealant to the ring nut on the outside and the backer nut will serve as the connection to the bare sheet metal roof on the inside. Should be fairly straight forward install. This will allow me to be able to unscrew the antenna and use the cap that came with the Stryker as a weather seal for the SO239 connector. I'll include this install in the video on the Luiton mini SSB radio.

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really looking forward to the video....
the guys here tell me to stay away from Amazon... I've been burned by small jumper coax cables and fittings like Elbows from Amazon only working for a few months... so if I do the roof mount kit I'll buy it directly from Stryker... $45.99 is cheap enough.

 

[niceguy71]

I'll still stick with my Laird CWB27 with its 67" whip and no tuning over the entire CB/10m range. It might actually work better than the Styker with its 49" whip. If someone has a mag mount Stryker they can loan me I will test it against a CW27 mag mount to see which is better.

the Stryker has a 66 inch whip... and the base sits up quite high too... the tip is over 70 inches in the air.

 

[niceguy71]

We’d all have bought LAIRD CWB27 or several by now based on your comments . . were they still available.

The dedicated thread has over 500-posts at present.


SIRIO 5000 also can be had with SO-239 mag mount (6.5’ tall). Link is a review from about (10) years ago comparing it to WILSON 5000.

This even-handed reviewer was influential for me in buying baseload S5000/mag for my son circa 2017, and why I upgraded mid-coil W2000 antennas to mid-coil S5000 3/8 Trucker on the semi-tractor (among other positive feedback) in 2023.


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my Sirio 5000 has the same connection as the Stryker.... so "if" I put it on my friends jeep.. it will be easy to switch the Stryker and the Sirio 5000 and take them both for a test.

 

[prcguy]

Exactly.

Yep a lot of us would.

I suspect this would be an interesting test depending on the testing criteria.

Basic gain difference test, a sedan for the two mag mounts under test, 27MHz exciter fed through 6dB attenuator to remove any mismatch/radio interaction. Both antenna types tuned for best SWR on test vehicle. Receive site another vehicle with wide band CW27 mag mount about 100yds away (to ensure far field) feeding a spectrum analyzer with .1dB/div scale for comparing difference in gain.

 

[prcguy]

the Stryker has a 66 inch whip... and the base sits up quite high too... the tip is over 70 inches in the air.

SR-A10 mag mount is advertised as a 63 in whip which is good. With its large dia silver plated coil and long whip it probably works a tiny bit better than the Laird CW27 but I don't see it being a broad band antenna that can cover all of CB and 10m amateur without tuning like the Laird.

 

[prcguy]

my Sirio 5000 has the same connection as the Stryker.... so "if" I put it on my friends jeep.. it will be easy to switch the Stryker and the Sirio 5000 and take them both for a test.

I'll be north of you next month in Tewkesbury and can bring a CW27, mag mount and small spectrum analyzer. Wanna go on a field trip and test antennas?

 

[niceguy71]

I'll be north of you next month in Tewkesbury and can bring a CW27, mag mount and small spectrum analyzer. Wanna go on a field trip and test antennas?

absolutely.... we can make something work
I'm retired and have nothing planned for the next 10 years

 

[prcguy]

absolutely.... we can make something work
I'm retired and have nothing planned for the next 10 years

Might be able to fit an antenna test into my schedule somewhere in the next 10 yrs. I'll PM you when my trip gets closer but you will have to travel north.

 

[KMG54]

I'll still stick with my Laird CWB27 with its 67" whip and no tuning over the entire CB/10m range. It might actually work better than the Styker with its 49" whip. If someone has a mag mount Stryker they can loan me I will test it against a CW27 mag mount to see which is better.

My mag mount A10 works great on my 98 siverado. I would loan it to you, but Texas to Mass, may be a bit out of your way!

 

[prcguy]

My mag mount A10 works great on my 98 siverado. I would loan it to you, but Texas to Mass, may be a bit out of your way!

Pack a keg, make a few stops at Buc-ee's on the way and we'll see y'all there.

And don't make me wear my Buc-ee's swim trunks at the antenna party.....

 

[niceguy71]

Basic gain difference test, a sedan for the two mag mounts under test, 27MHz exciter fed through 6dB attenuator to remove any mismatch/radio interaction. Both antenna types tuned for best SWR on test vehicle. Receive site another vehicle with wide band CW27 mag mount about 100yds away (to ensure far field) feeding a spectrum analyzer with .1dB/div scale for comparing difference in gain.

this video talks all that band width stuff I know you like... they said the Stryker could talk 10 and 11 meters without a antenna tuner.... I don't know how true it is... but I watched this whole video and it was interesting... I have it set to start near the band width part.... I think.
all this stuff is over my head.

 

[EAFrizzle]

they said the Stryker could talk 10 and 11 meters without a antenna tuner.... I don't know how true it is...

It will work on 10 and 11, but not across the whole 10 meter band. While you can get a good chunk of the SSB/CW part of 10 meters along with CB, you miss out on the FM portion of the band. The Stryker gets pretty close at < 2:1 bandwidth, which most ham rigs will accept just fine, but your export rigs won't like at all.

That's one reason Hustler coils were so popular back in the day; took less than 30 seconds to swap one out.

< 2:1 SWR bandwidth is 26.600 to almost 29.000. <1.5:1 from 26.900 to 28.600. Essentially flat from 27.200 to 28.000.

 

[slowmover]

I thought the last guy on 10M was buried a few years ago . . . .

 

[EAFrizzle]

Nahhh, they just curl up in the corner until they hear, "CQ CONTEST". 😆

 

[prcguy]

this video talks all that band width stuff I know you like... they said the Stryker could talk 10 and 11 meters without a antenna tuner.... I don't know how true it is... but I watched this whole video and it was interesting... I have it set to start near the band width part.... I think.
all this stuff is over my head.

With a measured SWR of 2:1 at 25.97 to 28..04MHzon the Stryker you should be able to move that up so the low end is about 26.7 and the upper end is 28.77 at 2:1 then ch 1 CB and about 28.5 10m would be well below 2:1. In the video its kind of a joke to use an Icom 7100 S meter for comparing gain difference when the difference between one S unit is 6dB. Its easy to use even a cheap spectrum analyzer to measure within .1dB between antennas.

 

[slowmover]

“ . . Its easy to use even a cheap spectrum analyzer to measure within .1dB between antennas”


I’m really looking forward to the day I can afford such.

The pain of having had to retire prematurely before getting TT & TV resto work completed and radio systems to satisfaction is mainly how much longer it all takes.

So, I may drag along on this TV (tow vehicle) install, but the satisfaction of not being hurried is recompense. The synchronicity of coincidence whereby I recall I bought supply years ago which could be used where I hadn’t considered it has been a series of pleasant surprises.

More and better diagnostic tools ought to be equal fun.

Thanks for planning another interesting mobile antenna test.

Would be great if a “new” 7’ mobile antenna to match an Export AM/FM/SSB (NRC) 10/11/12M Radio could be advice for the new man, immediately he shows up.

I’d want oneself.

This or similar in the meantime as 24.89 to 29.70 isn’t going to happen without circuitry mojo:



NRC-Export is probably more popular than it’s ever been and will continue on an upwards trajectory for some time.

So why not make licensure that much more attractive for mobile/stationary?

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[RFI-EMI-GUY]

Would be great if a “new” 7’ mobile antenna to match an Export AM/FM/SSB (NRC) 10/11/12M Radio could be advice for the new man, immediately he shows up.

Actually someone could pose this question to Stryker or President as they would benefit as most of their buyers want to use radios over this spectrum. The CW27 patents have probably run their course and the inventor is still alive and hopefully well in Illinois.

 

[slowmover]

The LIDO LML-MAX Seatbolt Mount solved the radio mount problem.

An antenna which fully complements the radio’ capability is another logical step.

We’re almost there with a headrest mount for DRX-901 (need diagram to cut steel) so the hi-fi speaker can be just slightly behind/above drivers seat.

Best Mobile should be an ordered (tested) set of choices:

Spend more? Not much benefit.

Spend less? Can prove that a fixed entry price is worth getting it right the first time.

On a trip somewhere? Be part of the event stream.

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[prcguy]

Actually someone could pose this question to Stryker or President as they would benefit as most of their buyers want to use radios over this spectrum. The CW27 patents have probably run their course and the inventor is still alive and hopefully well in Illinois.

The components for broadbanding would seriously limit the power handling of the antenna. The Laird CW27 is rated at 200w and Stryker seems to cater to the higher power crowd.