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Only bandpass filter I ever saw or used was made by Jim Finch of SSE Electronics.
Don't think they are still in production as last time I was on Jim's website they weren't there, they were 26-30mhz and 300w power handling and very well made...
Nice to be back Jeff. Not been too great recently but some things never fail to cheer me up. Might go into production of these. Add a few led's as suggested could be the audio gainer of all time. Especially with a quick coating of tartan paint and copious amounts of swr grease. Lol. Hope you're...
I'd be careful rg58c/u is marked with mil-c-17f/g or M17/28.
I'd avoid anything that says rg58 type.
And so you can solder the braid properly I'd go for amphenol 83/822 or amphenol 83/1sp both with an amphenol ug175 reducer.
If body/tip is nickel plated file tip or holes to base brass and tin...
I smell obscene amounts of copious bullshit.
My wee hp4000 only has 12' of mil spec rg58 on it and has banged into s.africa.oz and all over s and n america. Surely I wasn't dreaming and running an underlegth coax run.
Wonder how many mugs will buy it. Lmao.
Couldn't agree more mate.
Sometimes a bit of humour/sarcasm can lighten the mood.
The written word is very easily misperceived, especially when in heat of moment you forget to add a wink, smile, tongue out etc.
What was a minor disagreement or calculation can soon blow out of proportion.
I know its coincidental as you say. But in saying that makes you wonder how many other things taken as fact in radio are purely coincidental too.
Sure you were only inches out and to be fair arithmetic is a much bigger strength of mine than radio theory.
You pulled me about using ch20...
I'm well aware the velocity factor doesn't affect the shield outer was merely an observation that both chokes contain an electrical 1/4 wave of coax or thereabouts.
I'm also aware of what the turns do.
I notice you omitted the bit that your figures are wrong ;) lol :)
I get slightly different figures.
for diameter your measuring to centre point of coaxial on either side of core. In effect measuring the diameter of the cable itself.
Using 5mm/.19" rg58 I get rounded up.
3.14 x 4.25" + .19" = 4.44" x 5 turns.
3.14 x 4.44" = 13.94" x 5...
Sorry I haven't had time to read Henry's report, comment or answer messages.
I have been quite ill recently and had a bit of a fall early last week that resulted in an unscheduled collision with a glass tv stand, a floor standing speaker I decided to glasgow kiss on the way down and a collision...
Maybe if you look in right place you'll find schematic.
Go to servicedocs.com search by brand dropdown. Select President and scroll down to Grant 2 schematic. As well aa schematics/user manuals and service manuals for most European Presidents ;)
Would love to go to Geraldton. My aunt lives there. Emigrated years ago and never came back. Not that I blame her. Xmas dinner on the beach or sitting next to an eskimo in Scotland. Fucking tough choice. I should have emigrated there myself 6 year ago when I got offered.
I imagine the local qrm...
I wouldn't say its impossible to make antenna comparisons. I just think its very hard to make accurate measurements, especially using seperate masts.
the s meter will show relative increases/decreases of signal levels but not accurately. Backing it right off could be as bad as...
Most if not all serious mobile dx stations in Europe run a Sirio 4/5000 series antenna. Ain't anything to choose between them. Power handling on Sirios can be a bit exaggerated but will comfortably handle 2-300w. Coax supplied with mag145pl is proper mil-c-17f on older bases and M17/28 Rg58c/u...
I prefer a magmounted sirio hp/megawatt 4000 for that reason. But when static using a sirio so239-3/8 adaptor you can screw a 1/4 wave whip on. Not that you need too.
I ain't see a sirio mag145pl come off yet. Park up high enough you'll rip the arse out all the local base stations. At times I...
I don't do whips anywhere but centre of roof, including 1/4 wave ones or the 6'7" sirio, both will easily beat a wilson or k40 both on bandwidth and performance. 102" is too short for a cb whip.
it wasn't an opinion. its fact, no antenna will beat a centrally mounted 1/4 wave whip, and everyone...
Its a long story Eddie but Jazz was my nickname long before the cb, usually preceeded with mad, cause I was a bit mental when young, had to be in my area of Glasgow, the name actually came from Jas, on my front door, which was short for my Dad James, The first night I ever saw a cb was my mates...
It would be very very hard to guess what the signal difference would be between two very similat 0Dbd gain antennas at fullwave spacing and similar height with similar coax.
The part of the picture you are missing out is there may be multi signal paths on both antennas, all of varing phases...
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