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End Fired Phased Array Antenna
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Marconi's Sigma4 vs. Gain Master Signal Report and video.
Here his my YouTube video of this comparison test and the on air Signal Report I did later that day with a few local buddies that were talking on channel 39 lower sideband.
Here we also hear a story about Russel's "Rain Crow Filter." Just a note for myself.
Here we also hear a story about Russel's "Rain Crow Filter." Just a note for myself.
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Best antenna setup for a high RF area
I have a relatively unique issue. I work for a company that records racing audio for multiple classes of motorsports. We do this using a set of software defined radios (SDR). We need to be able to receive broadcast between 450 - 470MHz. There is also a lot of other RF signal through out the rest of spectrum including local tv broadcast, wifi, and emergency frequencies. We currently use a hardware bandpass filter to help remove the signal out side of the 450-470MHz that we are looking...
Best antenna setup for a high RF area
Best antenna setup for a high RF area
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AMPLIFIER CLASSES
The old tube CB (11 meter) amps such as d&a, Palomar, wasse, Elkins, pride etc etc etc fall under which class? I'm assuming since they usually sound as good on SSB as they do on AM I can exclude class C. I don't know what it is in an amps build that gives it it's class rating so I'm hoping for a synopsis. I did do an online search but I couldn't find anything on the class distinction of the tube type CB amps I've mentioned above. Thanks. 73
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Best Coax for Base Antenna
What is the absolute best coax for my base station running on 4 watts to A99 with Ground Plane Kit. I want the absolute best! I'm only running about 27 feet from radio to antenna, with an inline Polyphaser. I want the absolute least amount of loss.
So, what's the best coax and where should I order it from? Thanks!
So, what's the best coax and where should I order it from? Thanks!
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Bird 43 slugs
Hello again:
I was wondering if anyone could explain to me the difference in a bird 43 elements that are for 2-30mhz vs the 25-60mhz as far as covering the 27mhz cb band or are there not any difference for that mhz thanks alot sorry for the poor punctuation 73's
I was wondering if anyone could explain to me the difference in a bird 43 elements that are for 2-30mhz vs the 25-60mhz as far as covering the 27mhz cb band or are there not any difference for that mhz thanks alot sorry for the poor punctuation 73's
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MOSFET Question
Happy New Year one and all.
Over the past several years, I've done various conversions from NPN finals to 2030 or IRF520 MOSFETS with mixed results.
In single final radios, I typically see the MOST gain with the IRF520 versus the 2SC1969. In dual final radios, it's a 50/50 split between a beta matched pair of 1969's, vs. twin IRF520's.
However, recently it has come to my attention that Fairchild makes a MOSFET called the FQP13N10 (as used in the Stryker SR-955HPC for example) that...
MOSFET Question
Over the past several years, I've done various conversions from NPN finals to 2030 or IRF520 MOSFETS with mixed results.
In single final radios, I typically see the MOST gain with the IRF520 versus the 2SC1969. In dual final radios, it's a 50/50 split between a beta matched pair of 1969's, vs. twin IRF520's.
However, recently it has come to my attention that Fairchild makes a MOSFET called the FQP13N10 (as used in the Stryker SR-955HPC for example) that...
MOSFET Question
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QYT KT-8900D Dual Band Mini Radio
I ordered one of these today from eBay. It's the Gen 2 version and the price is under $100 including the programming cable and software CD. Anyone else have one? I just wanted something to monitor the local not so busy repeaters and to play around with. I may take my aging Kenwood dual bander out of the truck for the winter and Velcro this one in there somewhere. It's small enough.
View attachment 19414
View attachment 19414
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Two different types of coax on the same setup?
So...would there be any downside to running rg8x on the "high side" of a linear amplifier going to the antenna and using rg58 on the "low side" to the radio where there is less power going through it?
Ideally I'll have enough rg8x to do both sides....but jic...I thought I would ask.
We are talking about run of less than 30 feet total.
Ideally I'll have enough rg8x to do both sides....but jic...I thought I would ask.
We are talking about run of less than 30 feet total.
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Bob's CB Shop
Bob's CB shop is awesome. I recently purchased a Stryker 655hp from him. Awesome radio and a awesome tune. Installed the radio in my KW truck, connected to a single Wilson 2000 ant fed with 12ft. of mini 8 coax.
Radio is powered from the factory installed dash post for positive and negative. Idling it's carrying 14.1v keyed up and talking it's carrying 13.4v. Variable deadkey is from 1w to 20w swinging to between 80-85 watts. Man what a TALKER!! 30-50 miles consistently...
My hats off to...
Bob's CB Shop
Radio is powered from the factory installed dash post for positive and negative. Idling it's carrying 14.1v keyed up and talking it's carrying 13.4v. Variable deadkey is from 1w to 20w swinging to between 80-85 watts. Man what a TALKER!! 30-50 miles consistently...
My hats off to...
Bob's CB Shop
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Cobra 19 Plus Mosfet mod?
Got a 19 Plus someone gave me, and I cannot find the mosfet mod for it. I know it can be done; just can't find anything on the 'net that shows how to do it.
Was wondering if anyone has a link for this mod, or can give a quick mod plan to do it.
Also, if there is a cap/resistor swing mod for it, I'd like to experiment with that too.
It also has a problem with the LED channel display (some segments won't light up, and this doesn't use the standard 25/29...
Cobra 19 Plus Mosfet mod?
Was wondering if anyone has a link for this mod, or can give a quick mod plan to do it.
Also, if there is a cap/resistor swing mod for it, I'd like to experiment with that too.
It also has a problem with the LED channel display (some segments won't light up, and this doesn't use the standard 25/29...
Cobra 19 Plus Mosfet mod?
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Galaxy Dx949, Texas Star dx350 HDV, Ranger RCI dx2950,
Getting rid of stuff I dont use anymore. PAYPAL prefered. More pics coming, Prices include shipping!
View attachment 19967
Galaxy DX949 - Like brand new. Bought it new on Ebay from a Reputable seller. They tuned it, I think it has upgraded finals, have to check for sure on that. 160$
2 pill no name Amp. works but needs a tune up or possible CAPS added or replaced. 50$
D104 mic, works, wired for the Galaxy - $45
Ranger RCI DX2950, Yellow background on screen, Bought it used 5 years...
Galaxy Dx949, Texas Star dx350 HDV, Ranger RCI dx2950,
Galaxy DX949 - Like brand new. Bought it new on Ebay from a Reputable seller. They tuned it, I think it has upgraded finals, have to check for sure on that. 160$
2 pill no name Amp. works but needs a tune up or possible CAPS added or replaced. 50$
D104 mic, works, wired for the Galaxy - $45
Ranger RCI DX2950, Yellow background on screen, Bought it used 5 years...
Galaxy Dx949, Texas Star dx350 HDV, Ranger RCI dx2950,
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Finally bought a Sirio 5000 to try...
Well, I just bought a Sirio "P-5000" from HY Electronics...hopefully I bought the right one. I've been curious about these for several years now, with everyone stating how much better than a Wilson they are, which is pretty much the benchmark. Decided after reading another thread on the Sirio today, to final buy one to try.
I've got two Wilson 5000s in use right now...one is probably 15 years old, the other is about two years old. Both are roof mounted, so should be easy to swap the...
Finally bought a Sirio 5000 to try...
I've got two Wilson 5000s in use right now...one is probably 15 years old, the other is about two years old. Both are roof mounted, so should be easy to swap the...
Finally bought a Sirio 5000 to try...
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148 shorts out with antenna ground
Hey guys,
I got a weird problem with one of my Cobra 148s. Whenever I hook up the antenna ground the channel indicator goes off as if something is shorting. I'm gonna check it out when I get home but in the meanwhile I'd like to hear your ideas as to what may be wrong.
I got a weird problem with one of my Cobra 148s. Whenever I hook up the antenna ground the channel indicator goes off as if something is shorting. I'm gonna check it out when I get home but in the meanwhile I'd like to hear your ideas as to what may be wrong.
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Mirage 36hp schematics
Im looking for schematics voltage charts any tech info for a mirage 36hp it has a eptdx2912z board any help greatly appreciated
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Need a lil help with the TEABERRY RANGER " T " ssb mobile please
TEABERRY RANGER " T " seems to be pretty rare but I've got 2 of them and they both have issues not working properly. I rather like the way they look and I was just at my local techs and he couldn't repair them with lack of documentation but I do have the users manual with parts list and schematic in the back but the schematic didn't show ANY info on the PLL chip inside which the MB8709......
Need a lil help with the TEABERRY RANGER " T " ssb mobile please
Need a lil help with the TEABERRY RANGER " T " ssb mobile please
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Best Moblie Antenna for OTR Truck
Hey All!
I am looking for the best mobile antenna to be mounted on an OTR truck with the best send and receive. Any good suggestions? I used to run a Wilson 5000 Trucker. I want to try the Sirio Performer 5000. Any and all help and suggestions will be greatly appreciated!
Thank You!
I am looking for the best mobile antenna to be mounted on an OTR truck with the best send and receive. Any good suggestions? I used to run a Wilson 5000 Trucker. I want to try the Sirio Performer 5000. Any and all help and suggestions will be greatly appreciated!
Thank You!
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Eagle 525 Base Linear?("Not Golden or Browning")
I am looking for any and all information on a Eagle 525 tube base linear. This is not a golden or browning linear. I am looking to purchase it, But I need to know some information first. I was told it has been re-capped and re-tubed with very little use since it was done. I need to know how many watts to expect deadkey and peak, How many and what tubes does this unit use? How much is a fair price to pay for this unit? ect. ect. Anything that you guys know that you could tell me about this...
Eagle 525 Base Linear?("Not Golden or Browning")
Eagle 525 Base Linear?("Not Golden or Browning")
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Still a work in progress...
Come April I have been a member for 4 yrs. Couple yrs ago I posted some pics of the install of my old honda. I figured it's time to share some pics and info on my home setup. This is, as the title of thread suggests, a work in progress. It's been about 3 yrs in the making and not complete yet. Lots of hard work, time, $...ect.. I'm very thankful for the help of my radio friends both new guys and elmers.
View attachment 20110
Lots of digging by hand. Did it by my self over a couple...
Still a work in progress...
Still a work in progress...
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m-400 starduster
Sitting here look at directions for a m-400 now what the beep want to set it for 10/11 meter says 2607mm which is 8feet now is that from the tip of the top radial to the tip of the lower radials.
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