Hi all,
Well, I have enjoyed the heck out of this radio for the past couple of years, and now it is time for me to move on to a new radio endeavor. In order to do that, i must sell my favorite Madison (I have three).
Right off the bat i will tell you that it's not going to be cheap. I am going to accept offers, but only for a day or two, and i will expect payment within a day of accepting your offer so please be serious.
I will only accept a paypal payment, and my paypal is: loosecannonradios@gmail.com
So, I am selling the radio for $600 shipped (or best offer. please make offers using the Private messaging called 'start a conversation' here on the forum). Shipping on this item will be between 40 and 70 dollars depending on where you are because i want it to get to you in one working piece.
(i will only ship to the continental US)
I am not putting this on ebay yet because i want a forum member to get the radio, but if it does not sell in a few days, then i will be putting it up there.
Now for the fun stuff. Here is a list of everything that has been done to the radio, followed by a whole bunch of pictures of it.
First, the radio has been completely re-capped and aligned using the proper test equipment.
All of the corrosive glue has been completely removed.
The modulation circuit is stock except for adding a variable control (the little blue rectangle on the board), as the madison did not come with an adjustable AMC from the factory. The radio has been set for a 4 watt deadkey and 100% modulation as can be seen in the pics.
I have not modified the receive and transmit sections of this radio except for changing the value of a few caps in order to broadband it because of all the channels this radio has.
You will notice a bunch of blue resistors in the 455khz IF section of the radio.
Those are non inductive 1% tolerance resistors that were put in there as an experiment due to a specific noise problem i have at my location. They may have helped a little bit so i left them there.
the PLL section of the radio has been changed in order to accommodate an MC145106 PLL chip that goes along with the digimax lite channel mod that has been installed.
This channel kit uses the VCO to automatically set its range, and this one went from 26.085 to 28.755.
(actual range where the radio will key reliably is 26.105 to 28.705 or so)
the receive and transmit really start to drop off around 26.305 and at the top around 28.205. above and below that range the radio is basically deaf and mute.
That's still a whole bunch more channels than any other MB8719 radio with standard mods!
As im sure you have noticed, the digital clock is gone and has been replaced with a six digit frequency counter. This is a completely custom install, and is very professional if i do say so myself LOL.
Because of the noise these things make, significant mods had to be made, and i was very successful in getting rid of 99% of the noise.
If you turn the radio on with no antenna connected, you can hear it a tiny bit, but with an antenna connected you will never hear it.
The PC board ground has been tied to the chassis ground for safety and noise abatement.
The old power supply was removed and replaced with a switching type supply. this supply does not introduce any additional noise into the radio. i believe it is a 10 amp supply, and is set for 13.8 volts.
The AC cord was replaced with a three conductor cord and the ground wire is connected to the chassis of the radio.
Im sure im forgetting something, so please feel free to ask any questions about the radio in this thread.
again, i would like the offers to be made using a private message to me (called a 'conversation' on this forum).
pics to follow soon.
LC
Well, I have enjoyed the heck out of this radio for the past couple of years, and now it is time for me to move on to a new radio endeavor. In order to do that, i must sell my favorite Madison (I have three).
Right off the bat i will tell you that it's not going to be cheap. I am going to accept offers, but only for a day or two, and i will expect payment within a day of accepting your offer so please be serious.
I will only accept a paypal payment, and my paypal is: loosecannonradios@gmail.com
So, I am selling the radio for $600 shipped (or best offer. please make offers using the Private messaging called 'start a conversation' here on the forum). Shipping on this item will be between 40 and 70 dollars depending on where you are because i want it to get to you in one working piece.
(i will only ship to the continental US)
I am not putting this on ebay yet because i want a forum member to get the radio, but if it does not sell in a few days, then i will be putting it up there.
Now for the fun stuff. Here is a list of everything that has been done to the radio, followed by a whole bunch of pictures of it.
First, the radio has been completely re-capped and aligned using the proper test equipment.
All of the corrosive glue has been completely removed.
The modulation circuit is stock except for adding a variable control (the little blue rectangle on the board), as the madison did not come with an adjustable AMC from the factory. The radio has been set for a 4 watt deadkey and 100% modulation as can be seen in the pics.
I have not modified the receive and transmit sections of this radio except for changing the value of a few caps in order to broadband it because of all the channels this radio has.
You will notice a bunch of blue resistors in the 455khz IF section of the radio.
Those are non inductive 1% tolerance resistors that were put in there as an experiment due to a specific noise problem i have at my location. They may have helped a little bit so i left them there.
the PLL section of the radio has been changed in order to accommodate an MC145106 PLL chip that goes along with the digimax lite channel mod that has been installed.
This channel kit uses the VCO to automatically set its range, and this one went from 26.085 to 28.755.
(actual range where the radio will key reliably is 26.105 to 28.705 or so)
the receive and transmit really start to drop off around 26.305 and at the top around 28.205. above and below that range the radio is basically deaf and mute.
That's still a whole bunch more channels than any other MB8719 radio with standard mods!
As im sure you have noticed, the digital clock is gone and has been replaced with a six digit frequency counter. This is a completely custom install, and is very professional if i do say so myself LOL.
Because of the noise these things make, significant mods had to be made, and i was very successful in getting rid of 99% of the noise.
If you turn the radio on with no antenna connected, you can hear it a tiny bit, but with an antenna connected you will never hear it.
The PC board ground has been tied to the chassis ground for safety and noise abatement.
The old power supply was removed and replaced with a switching type supply. this supply does not introduce any additional noise into the radio. i believe it is a 10 amp supply, and is set for 13.8 volts.
The AC cord was replaced with a three conductor cord and the ground wire is connected to the chassis of the radio.
Im sure im forgetting something, so please feel free to ask any questions about the radio in this thread.
again, i would like the offers to be made using a private message to me (called a 'conversation' on this forum).
pics to follow soon.
LC
