I live in rural area have not heard a soul in days?
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11 meter is very quiet?
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Series Pass Modulator for D.I.Y. Hi-Fi & Asymmetry
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Solid State "Ultra Modulation" Series Pass Modulator
Inspired by: RevBow's "BME"
& CBphreaker's "Wabi-Sabi Mod"
written by: LeapFrog 1-1-2020
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Wideband Audio Modification W/ Controlled Carrier
Too long, didn't read: Discussion of series pass modulator modification, not a "how to".
In high-level modulated radios such as Cobra 19/25/29's the "communications grade"
modulation transformer...
Series Pass Modulator for D.I.Y. Hi-Fi & Asymmetry
Solid State "Ultra Modulation" Series Pass Modulator
Inspired by: RevBow's "BME"
& CBphreaker's "Wabi-Sabi Mod"
written by: LeapFrog 1-1-2020
=========================================
Wideband Audio Modification W/ Controlled Carrier
Too long, didn't read: Discussion of series pass modulator modification, not a "how to".
In high-level modulated radios such as Cobra 19/25/29's the "communications grade"
modulation transformer...
Series Pass Modulator for D.I.Y. Hi-Fi & Asymmetry
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29 receive
OK, I have two cobra 29 LTD‘s .
One is from Taiwan and the other is from the Philippines. My Taiwan radio when receiving, sits at zero. The Philippines model sits at about three. When people talk, I get the same signal. The problem here is that, people who give me about 3 pounds I have a hard time hearing them because I’m getting 3 pounds of static where as the other radio is quiet and sits at 0 pounds . Does the radio need an alignment for the meter to sit at zero even though people...
29 receive
One is from Taiwan and the other is from the Philippines. My Taiwan radio when receiving, sits at zero. The Philippines model sits at about three. When people talk, I get the same signal. The problem here is that, people who give me about 3 pounds I have a hard time hearing them because I’m getting 3 pounds of static where as the other radio is quiet and sits at 0 pounds . Does the radio need an alignment for the meter to sit at zero even though people...
29 receive
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Hopper built amps/ICA manufacturer
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Rg8u vs Rg58 Coax question
Hello, Im not sure what forum to post this question. I am needing to know which coax would suit my needs best. I live in Kentucky and we run mountain lines for our antennas. It is 1000ft to the top of the hill where my cb base station antenna is at. I currently am running the big tv coax that is on the poles with the guy wire up the side of it. I have 50ft of rg8u coax on each end of it with a standing wave on 1 on all 40 channels. It has been up for 25 years with no problems. I was...
Rg8u vs Rg58 Coax question
Rg8u vs Rg58 Coax question
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My corner of the basement
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Export Radios, Amps, and the Police?
Here's a question I have searched for but have found no real answer and not sure there is a real one. Can the police arrest you if you have illegal export radio and amplifier in your vehicle hooked up? I have asked some that I know well and they didn't really know and said they wouldn't be bothered with it unless something was going on illegally. LOL! I have come over police radios in their cars right next to them only to receive a wave of cut it out. I did stop that when I learned what I...
Export Radios, Amps, and the Police?
Export Radios, Amps, and the Police?
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2SC2999 MOD ANALYSIS
Inorder for the mod to work, the 2SC2999N should:
1. provide the same (or preferably higher) stage gain at the receiver front end, and
2. The device itself should generate less noise.
There are two different receiver rf amp circuits: the common emitter and the common base. The common base circuit is found in the Cobra 2000, 148GTL, and most 10 meter exports. All of these units use the 2SC1674L transistor.
The common emitter circuit is used on the old 858SSB chassis, and most AM sets. In...
2SC2999 MOD ANALYSIS
1. provide the same (or preferably higher) stage gain at the receiver front end, and
2. The device itself should generate less noise.
There are two different receiver rf amp circuits: the common emitter and the common base. The common base circuit is found in the Cobra 2000, 148GTL, and most 10 meter exports. All of these units use the 2SC1674L transistor.
The common emitter circuit is used on the old 858SSB chassis, and most AM sets. In...
2SC2999 MOD ANALYSIS
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RCI 2980
Became friends with a local I talk to on the CB radio. I went down to his house to buy an old Astatic microphone, and he has tons of radio stuff that he has bought mostly from Hamfests.
Anyway, he offered to sell me a Ranger RCI 2980 for $100. There is nothing wrong with it, and works like it should. It looks like it is in very good condition. Would you buy it to use for a base station?
Anyway, he offered to sell me a Ranger RCI 2980 for $100. There is nothing wrong with it, and works like it should. It looks like it is in very good condition. Would you buy it to use for a base station?
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mods for realistic pro 2020
hi all. just wondering what mods are about for the realistic pro 2020 scanner.
im in australia and the aussie version does not do 30mhz to 50mhz.
the american version does. is there a mod to do this.?
thanks.
im in australia and the aussie version does not do 30mhz to 50mhz.
the american version does. is there a mod to do this.?
thanks.
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B&K 1040
Hello, I have a Bk 1040 that needs some servicing. The output for the O-scope is having some issues. Any info on some repair shops will be very helpful. Thanks
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Six Meters
I am considering putting up a 6 meter antenna and have read several articles about the "Magic Band" but am still not sure what to expect.
Will I go weeks at a time without hearing anything? Or is it a little less random than that?
Can anyone share their experiences?
Thanks!
Jim
Will I go weeks at a time without hearing anything? Or is it a little less random than that?
Can anyone share their experiences?
Thanks!
Jim
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My new car has defeated me.
So I changed my car a little while back from a 2010 Ford Mondeo (sold as Fusion in the US) which had a Kenwood TS480, a Kenwood TM-D710, a screwdriver antenna and dual band antenna installed to a 2019 MK4 Ford Focus. Work is quiet so I decided I'd swap all my radio gear in.
Looking at how hard it was going to be to route the power cables from the battery due to lack of room between the bulkhead grommet and engine I thought I'd better take a look at cable routing before I drilled a hole in...
My new car has defeated me.
Looking at how hard it was going to be to route the power cables from the battery due to lack of room between the bulkhead grommet and engine I thought I'd better take a look at cable routing before I drilled a hole in...
My new car has defeated me.
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Yaesu FRG-7 issue
my FRG-7 works in AM but no LSB, USB or CW?
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Looking for Simple NanoVNA guide
What is woefully missing, but very much needed, is a user friendly guide for NanoVNA.
It must have:
1.) Step by step instructions
2.) Photos of each step
3.) Clear layman's language
4.) Be geared toward use for antenna analyzing
It must NOT have:
1.) A historical review of development
2.) Geek/nerd speak
3.) Useless ramblings about lab/shack layout
4.) Scientific calculations
5.) be a Youtube (I like my movies action/adventure genre.)
If anyone has...
Looking for Simple NanoVNA guide
It must have:
1.) Step by step instructions
2.) Photos of each step
3.) Clear layman's language
4.) Be geared toward use for antenna analyzing
It must NOT have:
1.) A historical review of development
2.) Geek/nerd speak
3.) Useless ramblings about lab/shack layout
4.) Scientific calculations
5.) be a Youtube (I like my movies action/adventure genre.)
If anyone has...
Looking for Simple NanoVNA guide
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B&K 1040
I have a B&K 1040 that needs to be serviced. I’m having issues with the O-scope output. Any suggestions/contact info. on a good repair shop? Lmk Thanks
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Another New Texas Star DX 500V
I have another Texas Star DX 500V amplifier in from a friend to take a look at. He purchased it new about 2 months ago.
It is experiencing high VSWR's on any antenna, but almost flat on a dummy load. This information is according to an experienced tech who has already had it.
He asked me to take a look at it.
My initial suspicion is the DEI transistors that it came with, based on the information he provided.
I won't have an opportunity to look at it for awhile yet.
Keep you posted.
It is experiencing high VSWR's on any antenna, but almost flat on a dummy load. This information is according to an experienced tech who has already had it.
He asked me to take a look at it.
My initial suspicion is the DEI transistors that it came with, based on the information he provided.
I won't have an opportunity to look at it for awhile yet.
Keep you posted.
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Large Lot of New Noise Toys, Roger Beeps ect...
Hey dudes, I picked up a large LOT of noise toys from a CB shop that was going out of business. All of these are new-in-package. Most have instructions and the few that don't are typical 3 or 4 wire hookup. Some come with push buttons prewired. Most all are typical looking in those little square plastic boxes and are meant to install inside a radio. No surprises - just typical CB noise toys from a variety of the usual manufacturers. Many have shelf prices marked on them and range from $29.95...
Large Lot of New Noise Toys, Roger Beeps ect...
Large Lot of New Noise Toys, Roger Beeps ect...
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Can you measure your I- Max 2000
Anyone that has a I Max 2000 base antenna, can you take some measurements and post them here?
This is part of a thread reporting that the I-Max 2000 has been shortened for shipping reasons.
Thank you for you help.
73
Jeff
This is part of a thread reporting that the I-Max 2000 has been shortened for shipping reasons.
Thank you for you help.
73
Jeff
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Icom IC-7610 and RT Systems
Is anyone using this combo?
If so, how do you save repeaters into memory? I use RT Systems for most of my rigs. All of them have a separate box to enter transmit frequency. This only has option to enter receive. Never seen that before.
If so, how do you save repeaters into memory? I use RT Systems for most of my rigs. All of them have a separate box to enter transmit frequency. This only has option to enter receive. Never seen that before.
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