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Yaesu FTDX-101MP Two Tone IMD testing at 200w PEP after replacing the VRF150 finals - KJ7E 

Damon Stewart
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After popping one of the VRF150's, I replaced both with a new matched pair (see this video for more details: • Yaesu FTDX101MP PA fin... ). I wondered if the matched pair would provide any benefit to the TX IMD? The last time I tested this radio (in this video: • Yaesu FTDX-101MP Two T... ), I was only able to see -30dBc IM3, now I'm seeing a much better result, so possibly?
Here is a link to one of the better articles I have found that explains IMD measurements: dl.cdn-anritsu.com/en-us/test...

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5 авг 2023

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Комментарии : 9   
@mdblack98
@mdblack98 5 месяцев назад
Sounds like your 800/1600 bias adjustment was spot on to get better results.
@ve6kk
@ve6kk 10 месяцев назад
Nice work and gorgeous spec/an. All your station and antenna setup shows that you are an excellent tech. 73 Peter
@artc9114
@artc9114 6 месяцев назад
-34 in the 3rd order is way way better then the original finals from Yaesu with improper bias'ing. They should watch your video and train the tech's in Japan. Most 101 200 watt models with the AMC in the wrong direction I measure over the air and witness on the panadaptor are usually are about -28... The best I've seen are of course the Apache Labs Anan's at -62 in the third order at 1500 watts. Great video Thanks, N4QNT
@g0fvt
@g0fvt 11 месяцев назад
Well presented and not a bad result at all. Of course it might get significantly worse on 80m and 160m but overall as good as new.
@stevenandros4586
@stevenandros4586 21 день назад
Excellent video! I'm wondering if there would be any meaningful measurement change if you were to feed an analog 2 tone signal into the mic jack (IDK but I suspect not). Perhaps you could use the 2 tone generator in the LP-500. Cheers & 73 - Steve KG4LJB
@gixerags750
@gixerags750 8 месяцев назад
That Yaeusu and Siglent SA look very yummy...actually all your stuff is bang on...first time I have seen someone doing the 2 tone test I'm the digital domain.. Nice work. PeaceFromOzRadelaide 😊
@krisdevos7164
@krisdevos7164 8 месяцев назад
It would be purer if you used 2 RFcarriers with proper attenuators and then a combiner to avoid colouring the IMD.
@damonkj7e
@damonkj7e 8 месяцев назад
That only works for testing amplifiers, not exciters.
@otmanswadswadswad
@otmanswadswadswad 7 месяцев назад
جدا جدا
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