Those tests where at full power, with quite a bit ALC pulled,
also quite a bit of processing.
One can say that both radios was "forced" a bit, did also use
an audio RF clipper with the KWM2.
This is a modulated spectrum, I modulated the radios with the
mic for about 45 secs and this is the total sample.
I tested the FT-1000D also at 100W but difference was very
small, only changed a db or two towards the better.
Yes "on the air" I have tested to run the FT-1000D with no ALC
compared to ALC on top of the "blue" range. Difference 5 kHz away
is always about 5 dB lower spectrum with no ALC so yes I know that
it makes quite a bit difference.
Yes agree on the calibration also Jim, my two 1000Ds also needed
quite a bit of adjustments. I never did try to increase bias on these
radios, I remember I was playing with that when I had a TS-930.
Since I have measuring equipment I will play a little with that when
I get some time.
73 Jim SM2EKM
----------------------
pentalab wrote:
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### What power level did u run the FT-1000D tests at ?? I currently have 2 x FT-1000D's.... and 2 x FT-1000MP-MK-V's. haven't measured any of em. Seems to me the arrl lab measured -
36db PEP when then 1000-d was run full bore at 200 w out. Yaesu claimed -36db, compared to ONE tone [-42 db pep], when run at 150w out. ### Would be interesting to know what the 1000-D is at say 100 w output ? I'm betting it's very good.
### also... did u drive it into ALC ??? Try setting the power output at 200 w.... but only driving it to say 190w [no alc] and then at 150w.... and again at 100 w ..... all the while the power output control is sitting at 200w.... and no alc ever showing in any case. Then try it with alc at top of it range. ### Beware,,, my 2 x FT-1000D's new, were totally out of calibration on every thing...esp alc. Srvc manual sez between no alc.. and max alc... should be a 9.7 db difference..... mine was only 5.2 db. {which is better imo... since hams will wail away on the ALC]
### Also try adjusting the bias pot. I think the normal idle on a 1000-D is just 1 amp. Tweak it up to 1.5 A.... and also 2.0 A... and re-run ur tests.... u will be surprised. ### On the MK-V.... you can adjust EACH transistor independently.... ditto with the driver transistors.... and you do all of this TWICE.... once for AB... and again for CLASS A. ### On AB.. idle is 1 A PER final transistor 2A total. On Class A... it's a whopping 5 A PER transistor... and 10 A total. ### On the MK-V hidden menu 9-XXX... you can also adjust the "drive" on a band per band basis... most of em are way too high. On CW... reducing em a bit, will eliminate the key clix. ### To eliminate ALC overshoot on all these rigs... you can [ssb/cw] apply external -DCV to the ALC jack. You can also just limit the audio on ssb with external rack mount compressor's/limiter's/ distortion cancelled audio clippers. That way, I can achieve an easy 1500w with NO alc ever showing at all... if u wanted.
R L Measures wrote:
what Ham transceiver will allow testing of IMD below 40db?
### The yaesu MK-V on Class A... depending on BAND... is -60db for 3rds... and -75db for 5ths. You can hear the diff on a 2nd RX 3' away. I can also hear the difference from 1200 miles away [IF the other station is running barefoot, no linear] Later... Jim VE7RF
R L Measures, AG6K, 805.386.3734
r@..., , rlm@..., www.somis.org
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