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Radioddity QT80 (6666 pro clone)
- Thread starter Eldorado828
- Start date
Got my radio yesterday and played around with it a bit. Nice little rig, feels solid, and the receive is just as good, or a bit better, than my Heathkit SM-303.
I was able to whistle-up 70-80 watts on sideband and just a bit less on AM using a dummy-load. I'm happy and as soon as the temps get out of the basement I'll stick it in the truck and tune the Hamstick.
Justin B.
I was able to whistle-up 70-80 watts on sideband and just a bit less on AM using a dummy-load. I'm happy and as soon as the temps get out of the basement I'll stick it in the truck and tune the Hamstick.
Justin B.
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It would had been nice if he took a picture of the swing diode mod before he sent the radio back. The reason I am wondering is the swing diode mod is suppose to perform for example 2 watt dead key to full power . From what he described it wasn't going to full power from a low dead key. On all my other brand radio's with this mod this is how they perform 2 watt dead key to full power. . My 6666pro is still stock except for the modulation settings. I would really like to see a picture of the swing diode mod. npc mod or what ever anyone wants to call it .Lol
Please... I am curious... Why even bother to do a 2 watt deadkey to 80 watts??
Reason I ask is because that is the same radio that slapped this poor Magnum 2000 beyond the 9th dimension.
Nice burnt resistors inside it.
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I've been wondering the same thing! My rule of thumb for AM is that max swing PEP should be no more than 4X the deadkey.
If you're running the 6666PRO barefoot you should be good with 15 to 20 watts deadkey. That will give you swing to about 80 watts.
And if you're intending to run an amp behind it, that 80 watt swing from 2 watts DK will kill the amp input and do other damage, and fast!
Running an amp after an 80 watt radio is silly anyways, unless you're going for 500 watts or bigger.
To get this radio to full power when you turn the radio power up Anytone has it set for a dead key from factory of 20 watts. That dead key is way too much it will eventually burn the finals up not to mention the radio gets extremely hot. I added fans to the back to get it to run cooler but that dead key should be 7 to 10 watts max but when you adjust the dead key down to 7 watts you do not get the full power. That is why I am interested in doing the swing diode modification so the radio can run cooler and you can achieve full power without the high dead key.
The main reason to lower the carrier is to run an amplifier that isn't linear. A radio that does 10 watts carrier and 40 watts peak might end up doing a 200 watt carrier and swing to 300 watts out of the amp. And sometimes when running a driver amp into a bigger amp, the carrier can't be lowered enough.
That is true all the more reason to have the low 2 watt dead key. I am still waiting for info on the 6666pro so I can mod it to have that low dead key and swing. Thank you for your reply.