Got the RED & YELLOW

Bill in Georgia
Posts: 51
Joined: Sun Apr 09, 2017 8:03 pm

Re: Got the RED & YELLOW

Postby Bill in Georgia » Mon Sep 04, 2017 12:19 am

Sorry but I was sure I answered the questions....

Remember..."I have NEVER seen any change on S-ATT it is always been 0 and nothing else no matter what power level or what amount of wattage I put through the system..."

The only thing I haven'e done that was suggested: was to switch the cable from PS Input over to PS Feedback:..and put 100 watts into it to see if S-ATT will change off 0...

I'll review the entire thread in the AM, and post anything I may have missed..

I also think that I may hook up my 200D with the same coupler/pad package I'm now using with the 8000 ...although remember I removed the same components from the 200D which worked perfect and 30 minutes later the 8000 did not work...... as a matter of fact I even used the same software with 3.4.1.... that was FB on the 200D on the 8000...

Just does not make any sense... My intuition tells me if I re-installed the 200D, it would work, pointing the finger directly to the 8000 as the problem.
Bill in Georgia
Posts: 51
Joined: Sun Apr 09, 2017 8:03 pm

Re: Got the RED & YELLOW

Postby Bill in Georgia » Mon Sep 04, 2017 5:37 pm

Ps Iput and PS Feedback are reversed in my 8000.

After testing all cables by using the two SMA ports, all the cables are fine. PS worked with the factory jumper and my RG8 cables, Also check the SMA factory adapters, they were all fine.

So we reversed the cable from Input to Feedback, put 100 watts through it and it works...no more yellow and red but all green.

S-ATT is 15 at 1500 watts.....

Wanted to get down to 13, so began to sub pads...still 15 even with NO pads... no combination of pads would move it off 15

Took 3 screen shots
AmpView,,,,,,,with the PS TT running...
PS with it's TT running
The standard TT at 1500 watts

They all look terrible....

download/file.php?mode=view&id=122
download/file.php?mode=view&id=121
download/file.php?mode=view&id=120

Though for 3 minutes I weas out of the woods...????
Attachments
standard TT.jpg
standard TT.jpg (128.58 KiB) Viewed 21902 times
Pure Signal 1500 watts.jpg
Pure Signal 1500 watts.jpg (110.79 KiB) Viewed 21902 times
ampview.jpg
ampview.jpg (54.5 KiB) Viewed 21902 times
Bill in Georgia
Posts: 51
Joined: Sun Apr 09, 2017 8:03 pm

Re: Got the RED & YELLOW

Postby Bill in Georgia » Mon Sep 04, 2017 7:47 pm

Opened the radio ...yep it's reversed.... straightened it out...
I really like the way Apache designed this box...screws you can grab, and you can work on the radio without pulling it down...

Now tomorrow....at least progress was made!!

-Bill
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w-u-2-o
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Joined: Fri Mar 10, 2017 1:47 pm

Re: Got the RED & YELLOW

Postby w-u-2-o » Mon Sep 04, 2017 8:17 pm

Looks like my last guess was correct, about the reversal of the cables internally :o

Have you reported this to Apache?

The Ampview screenshot makes it look like you are over-driving the snot out of the external amp. The compression at the top right corner is phenomenal, I've never seen anything that bad.

I'm not saying that's the problem, only what it looks like.

At 1500W, with a 44dB coupling factor, and no pads, the step atten should be at 28dB. So, as you say, something is still wrong.
Bill in Georgia
Posts: 51
Joined: Sun Apr 09, 2017 8:03 pm

Re: Got the RED & YELLOW

Postby Bill in Georgia » Tue Sep 05, 2017 3:24 pm

After setting the proper levels, here is this AM's VIEW, at 1500 watts ..S-ATT = 14

download/file.php?mode=view&id=125
Attachments
ampvview.PNG
ampvview.PNG (41.96 KiB) Viewed 21895 times
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w-u-2-o
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Re: Got the RED & YELLOW

Postby w-u-2-o » Tue Sep 05, 2017 3:35 pm

.

Now that's a thing of beauty! :D

Interesting little double cross-over at the top. What amp are you using?

I would have predicted S-ATT = 18dB with a 10dB attenuator, however 14dB is within the range that others have reported (8000's seem to vary a little bit in terms of their internal construction, nobody has a handle on this yet, even after asking Apache directly).

Two pages of thrash all because of an assembly error at the factory. :x You had everything correct from the start! At least now we'll know the symptoms if someone else asks about the same symptoms. :roll:

So how's your transmit IMD? I bet it looks very nice, now!

73!

Scott
Bill in Georgia
Posts: 51
Joined: Sun Apr 09, 2017 8:03 pm

Re: Got the RED & YELLOW

Postby Bill in Georgia » Tue Sep 05, 2017 7:14 pm

Yes it sure looks good....IMD at 250 watts, id down -85 .....
Awful lots of towel twisting to find it's a honest mistake....

But sure do want to thank you and all the guys for hanging in there...and yes a lot was learned....

Thanks A;;..and keep an eye of that monster hurricane..185 mph winds..most ever in the Atlantic...

Bill ... KC4PE
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w-u-2-o
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Re: Got the RED & YELLOW

Postby w-u-2-o » Tue Sep 05, 2017 8:51 pm

What amp are you using?
Bill in Georgia
Posts: 51
Joined: Sun Apr 09, 2017 8:03 pm

Re: Got the RED & YELLOW

Postby Bill in Georgia » Wed Sep 06, 2017 5:33 pm

The amplifier is a former Alpha 78.
However the 8874's were replaced with a pair of Eimac 3CX 800's....

I released a pair of 9500's when the issue of repair/replace come to the forefront...

But the modded 78 served me well has the spot auto tuning.. runs cool at 1500 has plenty of head room....so...

-Bill

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