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Author Topic: Yaesu FT1000MP  (Read 1359 times)
W4UKR
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Posts: 33




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« on: October 28, 2008, 01:41:34 PM »

I have a problem on 20 when using the auto tune. The swr goes full scale with low input power. All other bands are ok and work fine with auto tune. Would appreciate any suggestions. tnx. jim
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WV4L
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Posts: 137


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« Reply #1 on: October 28, 2008, 02:36:43 PM »

Need a little more info Jim. What antenna are you using?
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W7KKK
Member

Posts: 374




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« Reply #2 on: October 28, 2008, 03:37:34 PM »

Without any further information I would suggest that 20 meters is beyond the tuning capability of the FT your chosen antenna setup.
They are better than some but the inboard tuners are limited as how much out range it can do.
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K1BXI
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Posts: 812




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« Reply #3 on: October 28, 2008, 05:57:36 PM »

What does the swr indicate on the MP with the tuner out?  

John
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WA3SKN
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Posts: 5457




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« Reply #4 on: October 29, 2008, 04:21:00 AM »

Will it match a dummy load?

-Mike.
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KA3TKZ
Member

Posts: 8




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« Reply #5 on: October 29, 2008, 05:22:00 AM »

You did not give too much info.  Try to match into a dummy load.  If SWR is still high the problem could be on the LPF-Unit (board).  This is an easy fix if you have steady hands and good equipment.  This is only speculation as the info is lacking.  I can fix this problem.


Whitney
N3ZV
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W4UKR
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Posts: 33




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« Reply #6 on: October 29, 2008, 07:43:49 AM »

I have about 2/1 without the tuner. Power out work 14300 with no problem. Problem is internal. tnx jim
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W4UKR
Member

Posts: 33




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« Reply #7 on: October 29, 2008, 07:46:22 AM »

It has app 2/1 without tuner. Problel is internal. tnx jim
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W4UKR
Member

Posts: 33




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« Reply #8 on: October 29, 2008, 07:47:23 AM »

Same problem into dummy load. Has app 110 watts out. tnx jim
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W4UKR
Member

Posts: 33




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« Reply #9 on: October 29, 2008, 07:49:51 AM »

Tnx I have the service manual but its confusing. That's where I thought the problem might be. I was hoping it would have diodes, easy to change. tnx jim
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K1BXI
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Posts: 812




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« Reply #10 on: October 29, 2008, 10:27:21 AM »

Jim..........before you tear into that MP, what is this antenna and feed line that is 2:1 without the tuner? 2:1 is not all that bad.

I have an MP and the internal tuner sometimes is very slow in finding the sweet spot. As it is searching the bar graph on the swr indicator sometimes goes all the war to the right several times before it settles down.   Sometimes up to 30 seconds. Once found then it is in memory for the next time.

You might try adding a short piece of feed line (15 ft or so) and try again on 20.

John
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W4UKR
Member

Posts: 33




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« Reply #11 on: October 29, 2008, 05:07:42 PM »

I'm using this with a R7000 and works great. SWR in about 2/1 max/ jim
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W4UKR
Member

Posts: 33




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« Reply #12 on: October 29, 2008, 05:11:36 PM »

Whitney, I figured it was that unit and I feel steady enough (age 88 yrs), can you give me some info on what to look for. The secedmatics are great but don't identify which is for what band. tnx jim
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KA3TKZ
Member

Posts: 8




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« Reply #13 on: October 30, 2008, 09:34:53 AM »

Give me your email and I will talk to you about this issue.


Whitney
N3ZV
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KA3TKZ
Member

Posts: 8




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« Reply #14 on: October 30, 2008, 09:36:28 AM »

I will be looking today to respond to your email.  I know that being on the air means quite a bit and I want to help you ASAP.


Whitney
N3ZV
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