An 8inch square or larger heat sink under that transmitter with the transistors mounted flat would take care of most of the heat issues. Possibly eliminate the fans all together.
Yep, I agree. All of them are on the edge so they could be bent down. This was my first AM and I don't use it anymore, but if I do for whatever reason, I'll try that.
So on that MFJ tuner box are you using the built in tuner, just the cabinet or both? My 2nd question would be what approx. range is this low power transmitter capable of with a long wire center fed dipole @ night?
Great video. Have you found any of those chinese 150 watt fm transmitter kits? If so, let me know cause the one you said you couldn't find where the Pll/vco ones.
Hi Spectra like all the videos and great professional information on transmitters do you have any plans on am short antenna I need one between1.6 to 1.7 MHz am broadcast band I appreciate if you have any video or plans thanks
Depends on how short you mean. If it's less than 70 feet (22 meter) it's not going to go very far. The simplest way is to use a tuner box like I showed in the video and just run a long wire out the back as long as possible and hammer a metal ground rod in the ground. If you add radials, it will be much better.
And BTW, you could use an isotron if you want it really short, but they are terrible. I tested it myself and it only went 1-2 miles with this transmitter.
Unrelated, but does anyone own this transmitter: www.aliexpress.com/item/4000055611009.html I'm thinking about reviewing it. Can you see what chip it has under the screen?
Here's the link I forgot to post (or deleted?? hmm)
www.ebay.com/usr/kleop313
Cant fimd the USER on ebay, its deems the item or user was deleted, please check, I really want to have that kit.
An 8inch square or larger heat sink under that transmitter with the transistors mounted flat would take care of most of the heat issues. Possibly eliminate the fans all together.
Yep, I agree. All of them are on the edge so they could be bent down. This was my first AM and I don't use it anymore, but if I do for whatever reason, I'll try that.
Schematic?
So on that MFJ tuner box are you using the built in tuner, just the cabinet or both? My 2nd question would be what approx. range is this low power transmitter capable of with a long wire center fed dipole @ night?
Where buy ????
www.ebay.com/itm/173881898593?hash=item287c2b3661:g:P-8AAOSw8VJZjxZU
Great video. Have you found any of those chinese 150 watt fm transmitter kits? If so, let me know cause the one you said you couldn't find where the Pll/vco ones.
Can't find. I only find the one with QN8066, not the better PLL/VCO.
@@spectra-man oh, how much where the Pll/vco ones?
Where can I buy that? And what kind of antenna do I need?
You buy it on ebay from Greece.
www.ebay.com/usr/kleop313
I explained in the video what antenna.
That link shows It's 3 watts 10 pep. Just FYI
@@timmack2415 range? I can't find anything in there. I think they left their bisness
@@timmack2415 They have multiple. I've seen a 40W pep before. They don't have it in stock all the time.
@@MiiMakerwww.ebay.com/itm/173881898593?hash=item287c2b3661:g:P-8AAOSw8VJZjxZU
Hi Spectra like all the videos and great professional information on transmitters do you have any plans on am short antenna I need one between1.6 to 1.7 MHz am broadcast band I appreciate if you have any video or plans thanks
Depends on how short you mean. If it's less than 70 feet (22 meter) it's not going to go very far. The simplest way is to use a tuner box like I showed in the video and just run a long wire out the back as long as possible and hammer a metal ground rod in the ground. If you add radials, it will be much better.
And BTW, you could use an isotron if you want it really short, but they are terrible. I tested it myself and it only went 1-2 miles with this transmitter.
antenna for 1.8 mhz - reckon for 1.6 mhz ra1ohx.ru/_pu/8/47794424.jpg
Unrelated, but does anyone own this transmitter: www.aliexpress.com/item/4000055611009.html
I'm thinking about reviewing it. Can you see what chip it has under the screen?
I asked the seller and they said "Dear customer our transmitter 50 watt has qn8066 chip.... Thank you".
@@antonio1681 Thanks. I didn't expect they would answer. Maybe I should test it then.
@@spectra-man I would, I wanna see your results with it. Hopefully it's somewhat near 50 watts.