A
AMengr
Guest
New kid on the block. AM transmitter and computer audio interface. Als9o, hard to find cable accessories. Check it out at: http://www.ambroadcaster.com
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I would like to see someone recreate the Panaxis AM transmitter, under license of coarse. I really wish ours were not stolen, the Panaxis was a loud (capable of 300% modulation) and stable transmitter. Our transmitters also had the Panaxis 5 watt RF amp added for carrier current operation, the actual output of the amp was closer to 8 watts. The transmitter had no problem operating in an intense RF environment, like some other part 15 am transmitters on the market today. Panaxis AM transmitters output was 50 ohms like the AM Broadcaster.com transmitter. We did some modification's to our Panaxis, including: adding a trimmer cap to the crystal, upgraded the output transmitter and upgraded the split rail power supply to 1 amp 15 volts +-. With a kit price under $90 in early eighties dollars; it was a bargain!
One improvement I would like to see for the transmitter on the AM Broadcaster.com web site, is an expanded usable bandwidth do the dial a bit. 1400 khz preferred but at least 1500khz. In the western USA; The expanded band in Southern California is pretty much filled up. 1500 khz is pretty much wide open 24/7, with only minor intrusion from San Jose at night. The 1500 khz planned for Southern California is never going to happen, 1510khz will be available for a while with the downgrade of KGA Spokane.
As it stands now, expanded band AM part 15 stations start to get hammered two hours before sunset, depending on conditions; sometimes as early as 1:00P PDT we start to get intrusion from other stations. It does not help that some expanded band station are being authorized for high power at night; One Southern California radio station runs 9kw at night, another Northern California station has just been authorized for higher night power. The days of part 15 AM usefulness may come to an end if the trend continues, it's hard to pit a 100 milliwatt signal against a nine thousand watt blow torch at night.
Radio Brandy's Part 15 am page has added a link to AM broadcaster.com
Steve
www.radiobrandy.com/RBpart15am.html
One improvement I would like to see for the transmitter on the AM Broadcaster.com web site, is an expanded usable bandwidth do the dial a bit. 1400 khz preferred but at least 1500khz. In the western USA; The expanded band in Southern California is pretty much filled up. 1500 khz is pretty much wide open 24/7, with only minor intrusion from San Jose at night. The 1500 khz planned for Southern California is never going to happen, 1510khz will be available for a while with the downgrade of KGA Spokane.
As it stands now, expanded band AM part 15 stations start to get hammered two hours before sunset, depending on conditions; sometimes as early as 1:00P PDT we start to get intrusion from other stations. It does not help that some expanded band station are being authorized for high power at night; One Southern California radio station runs 9kw at night, another Northern California station has just been authorized for higher night power. The days of part 15 AM usefulness may come to an end if the trend continues, it's hard to pit a 100 milliwatt signal against a nine thousand watt blow torch at night.
Radio Brandy's Part 15 am page has added a link to AM broadcaster.com
Steve
www.radiobrandy.com/RBpart15am.html
When the Mighty 1650 needs a bigger presence on the web, just let me know! We have plenty of banner free space available for Part 15 broadcasters. I sure wish this site would let us correct typos two minutes after the fact!
For the record at: at nearly $400 the transmitter kit offered on AM Broadcast.com is way over priced compared to other AM transmitters on the market. If you add an antenna and power supply you are getting pretty close to the price of the Rangemaster or Procaster certified transmitters; And way over the $300 for the ASMAX-1 DDS-based LP AM stereo transmitter from Aspisys.
For that price of $400, you can buy a EDM FM stero transmitter and still have enough left over to buy a Broadcast Warehouse 1 watt FM module transmitter and a 1/4wave ground plane from FM DX antenna.
Steve
www.radiobrandy.com
Should read Output Transistorupgraded the output transmitter
should read: bandwidth down the dial a bit.bandwidth do the dial a bit
For the record at: at nearly $400 the transmitter kit offered on AM Broadcast.com is way over priced compared to other AM transmitters on the market. If you add an antenna and power supply you are getting pretty close to the price of the Rangemaster or Procaster certified transmitters; And way over the $300 for the ASMAX-1 DDS-based LP AM stereo transmitter from Aspisys.
For that price of $400, you can buy a EDM FM stero transmitter and still have enough left over to buy a Broadcast Warehouse 1 watt FM module transmitter and a 1/4wave ground plane from FM DX antenna.
Steve
www.radiobrandy.com
G
greatstart
Guest
XRQKFM said:I would like to see someone recreate the Panaxis AM transmitter, under license of coarse. I really wish ours were not stolen, the Panaxis was a loud (capable of 300% modulation) and stable transmitter. Our transmitters also had the Panaxis 5 watt RF amp added for carrier current operation, the actual output of the amp was closer to 8 watts. The transmitter had no problem operating in an intense RF environment, like some other part 15 am transmitters on the market today. Panaxis AM transmitters output was 50 ohms like the AM Broadcaster.com transmitter. We did some modification's to our Panaxis, including: adding a trimmer cap to the crystal, upgraded the output transmitter and upgraded the split rail power supply to 1 amp 15 volts +-. With a kit price under $90 in early eighties dollars; it was a bargain!
Steve
www.radiobrandy.com/RBpart15am.html
Somewhere in my boxes of junk, I just may have the original 100mw transmitter.
I remember it was limited to just a few usable frequencies, such as 600, 750, 1200, 1500, etc.
You can change that by simply replacing the crystal. I haven't messed with that in over 20 years!
I may also have my old Graymark 515 and/or 505 3-tube transmitters that I made when I was 13 years old in summer camp.
-Glenn
A
Aljr
Guest
I had an old Panaxis AM unit offered to me free not long ago and passed on it. All it needed was a box. No room to set up a decent antenna here.
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