Flex-6x00 with Expert 1K & multiband watch. How to?

  • 1
  • Question
  • Updated 4 years ago

Hello guys

I have the following setting:
Flex 6700 ANT1 is connected to the Input 1 on Expert 1k.
I have two antennas:
ANT1 LowBnd double Z.
ANT2: OptiBeam Yagi.
ANT1 is connected to the Output 1 (Expert).
ANT2 is connected (Expert) on Output 2.


ON TX no problems at all...Hi


While the PA is turned off,  a multi-band multi panadapert & slice watching is possible.

When the PA is on (standby or run), then it is no longer possible. Only the current operation band (with on Expert is set) is OK, all others are "muted"

How do you configure that I can observe (panadaper & Sclice) multi-bands and the PA is turned on?

I thing it is  work as design, but it is there a simple posibility to do multiband/slace/panadaper watch when the PA is ON without Signal losses. (like when te Expert is OFF and die ANT1 ist direct connect to the Flex-6x000.


Thanks in advance

Emil,de DL8JJ

Photo of EMIL-DL8JJ

EMIL-DL8JJ

  • 48 Posts
  • 9 Reply Likes

Posted 4 years ago

  • 1
Photo of Stu Phillips - K6TU

Stu Phillips - K6TU, Elmer

  • 642 Posts
  • 256 Reply Likes
I suspect the problem is the ATU in the 1K - it will act as a bandpass filter for the current band.

From your description, it sounds like you have a single connection to the 1K from ANT1 on the 6700 and then use the 1K to switch antennas based on the bands you are using.

You might consider telling the 1K to bypass the ATU when you are using the Optibeam - I'm note sure of the impedance/frequency response of your double Z.

Stu K6TU

PS: Apologize for any slow response to this - I'm about to get on a plane!
Photo of EMIL-DL8JJ

EMIL-DL8JJ

  • 48 Posts
  • 9 Reply Likes

Stu,

thnaks for replay.

I think (sure) it is a 1K Problem with the ATU and the banpass into.

yes, of coure i do automaticly switch the ant from the 1K. I must only a single click from slice A on slice "X" and go ahead. The 1k switch the right antenna. That's great. 

BUT, during the RX AND the 1k is ON - 1k limited the ANT1 bandwidth. You can only see good signals on one or two bands simulatneously, but if you have for example 80m slice on ANT1 with 1k ON and second slice on 20M with the ANT2 you can not see both bands well.

That's the Problem...On TX-the best, but on RX i limited only to one (two) bands to see the receive the signals well. And if i can not see and hear the signals on other bands, it make no sence to use the best Flex-6x00 with so mutch opertunity to watch many bands simultaneusly in combination with expert 1k.

This is my question, if someone use 1k and watch many diferent dbands at the same time with 1k on.

Thanks

Emil, de DL8JJ

(Edited)
Photo of Asher - K0AU

Asher - K0AU

  • 168 Posts
  • 20 Reply Likes
I have seen the same thing.  I don't think there's a way to turn the tuner off.  Expert's approach is to use a separate receive antenna on the SO2R multiband receive port, but that's not what I particularly want either!  Have you contacted Expert to ask if they'd consider a firmware change to bypass the tuner on receive?
Photo of Stu Phillips - K6TU

Stu Phillips - K6TU, Elmer

  • 642 Posts
  • 256 Reply Likes
I took a look at the 1K manual and there is no bypass capability (unlike the 2K which has a bypass and also TX Inhibit which the 1K does not).

Another comment Emile,

Be sure to set the SSDR TXDelay to 20 mS - this will reduce the possibility of hot switching given the lack of an Inhibit on the 1K - better yet, this may be one of those rare cases where you do want to hook up the ALC on the amp to the radio.  My personal preference is to run without ALC and control the input power - that way you don't get nasty IMD transients when the ALC kicks in hard.

Here for a while and then onto another plane - home this time! Yea!

Stu K6TU


Photo of EMIL-DL8JJ

EMIL-DL8JJ

  • 48 Posts
  • 9 Reply Likes

Hey guys,

thanks for replay. Now all clear. I wanted to be 100% sure, that my test are confirmed now.

On TX: perfect at any case.

On RX: no chance to do multi band watching.

For me is clear, that the combination of Expert 1k and Flex 6x00 are not the best for my expectation and wishes.

Thanks again.

Cu

Emil, de DL8JJ


Photo of Sergey, R5AU

Sergey, R5AU

  • 801 Posts
  • 96 Reply Likes
Emil, 2K-FA should be you choice for the any SO2(x) modes
Photo of Stu Phillips - K6TU

Stu Phillips - K6TU, Elmer

  • 642 Posts
  • 256 Reply Likes
Well, it depends on your expectations and requirements.

After talking with several serious contest ops here in the US, its clear that the SPE2K isn't an all mode, US legal limit amplifier.  It can't deliver 1500 watts RTTY in contest operation.

The SPE products are good for DX'ing and have done a reasonable job at DXpeditions as well but for hard core contesting, they aren't a contender against a tube amps at least for US legal limit contesting.

My Alpha 9500 performed flawlessly all weekend in the California QSO Party - 1580 Q's including dupes on CW and Phone - plus an uncounted number of CQ's...

My Flex-6700 and the Alpha 9500 were awesome - a hard to beat combination.

Stu K6TU
Photo of Sergey, R5AU

Sergey, R5AU

  • 801 Posts
  • 96 Reply Likes
Well Stu, agree, tubes PA is the best solution for any DIGI`s for today, i am running with my 2k usually in full power mode where for DIG out is not over 1200-1300w (in this case amp protection circuit do not switch PA to the half power mode), however in the solid state line PA`s i think 2k on #1 position.