[1000mp] 1000MP MKV Field Filter Difficulty

[Hank Lonberg]

Harry:

Thanks I saw your post and checked mine out and sure enough the EDSP on CW
receive was on. I turned it off. My problem turned out to be a filter
mistake in my order. I was sent a 250 Hz 8.2 MHz filter for a 920 not a MP.

I pulled it and all is good. When I get my replacement I will install the
250 Hz pair and things will be fine. 

Again thanks for the tip and good DX.

73

Hank / KR7X


-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of htankin at comcast.net
Sent: Monday, June 21, 2004 5:44 PM
To: All about Yaesu 1000mp
Subject: Re: [1000mp] 1000MP MKV Field Filter Difficulty

Hank,

You may be suffering from a similar challenge I experienced with my "new"
Field.  I essentially had very constrained SSB audio even with the stock
filters. Tried and tried to figure out what was wrong.  Plus I had very
strong AGC swamping caused by strong signals 5kc or more away.  I posted the
"fix" below about a week ago...may /may not be relevant, but worth a try.

Harry WE1X

For all of those who have been reading (forced or out of curiosity) my tales
of 
woe regarding my Mark V Field I have good news...well good for you and great
for me.

My Field was experiencing incredible AGC swamping from strong sigs as far
away as 5 to 7 or more Kcs.  I could not believe this was a design fault.
There had to be another cause...either pilot error on my part with respect
to menu 
settings or something else.

In addition to that problem I could not get decent SSB receive audio with
menu 
5-0 SSB R set to OFF..which defaults the stock 2.4 filters to the NOR
position 
and the optional 2.0 filters to the NAR1.  Received audio was severely 
constrained..as if it was being affected by a narrow CW filter.  Nothing I
could 
do with the menu settings would fix this with the exception of setting menu
5-0 to 8.2-455 which puts the 2.4 kHz 8.2 IF filter in through position, and
the 2.4 kHz 455 in the 6 kHz position.  The power of deduction got me to
realize this setting was providing such wide bandwidth that an offending
signal 5 kcs away would pose a problem.

Okay..so Einstein here figured out what was causing the AGC swamping...but
how do I fix the problems with the menu 5-0 SSB R filter settings?
Contacted Yaesu tech support..they were stumped!  Chip M tried to help, but
no luck.  I was depressed!

Well tonight I "Googled" Mark V Field and came across a site that had menu 
settings for the Field..Okay..no big deal, except the list included A WHOLE
SLEW OF HIDDEN MENU SETTINGS for menu items 9-0 through 9-9.  The site had
listings of default settings.  Menu item 9-0 allows for adjustment of the
offset for the stock 2.4 Collins Mechanical Filter.  Once I punched in the
code to get into these menus for my Field, I discovered the receive SSB
settings under 9-0 were way out of whack!  They were set at F 1.60 and I
adjusted down to F 0.15 each for LSB and USB. The differnece was
amazing..night and day.  The NOR/NAR1 bandwidth settings now work fine with
menu 5-0 set to OFF.

Subsequently, the AGC swamping is now virtually gone as well!

For those of you interested in getting into these HIDDEN MENUS do the
following:

(1) Turn off the Mark V Field
(2) Hold down the FAST and LOCK buttons and turn on the rig
(3) Then push FAST and ENT as you would to enter the menu system.  

You can then go to menu items 9-0 thrugh 9-9

by the way, I believe 9-8 displays date the radio was made at the factory.



> Hello to the list:
> 
> Last night I installed the following Inrad filters in my MarkV field.
> 
> 1.8 KHz - 8.2
> 1.8 KHz - 455
> 500 Hz - 455 (collins)
> 500 Hz - 455 (collins) in sub receiver
> 250 Hz - 8.2
> 
> When I fired up the rig after closing it up the SSB receive is really 
> constrained, actually using Spectrogram it is 500 Hz wide not matter what
I do 
> with the filter settings and which I activate or deacitvate ???
> 
> Also the CW settings are reversed with norm being the 250 and narrow 1 and

> narrow 2 being about 500 Hz and 400 Hz wide respectively ???
> 
> The sub receiver 500 Hz acts normally switching in on cw and out with 2.3
KHz on 
> ssb.
> 
> I haven't fiddled with the 8-9 menu yet. 
> 
> I need some guidance here on how to proceed. I am at the office now so
can't 
> mess with the rig but has anyone come up against this?  I check the last
two 
> years of the list archives and found a few threads but none were directly 
> applicable to this problem. Unless the 8-9 menu settings will clear this
up.
> 
> Reply direct or thru the list I will try to summarize responses and the
eventual 
> solution in such a way to provide a chart of proceedures dealing with the
filter 
> settings on this rig. The manual is less semi usless.
> 
> Ciao and 73
> 
> Hank / KR7X
> IH9P Pantelleria Contest Team
> Tikirriki Contest Club
> _______________________________________________
> 1000mp mailing list
> 1000mp at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/1000mp
_______________________________________________
1000mp mailing list
1000mp at mailman.qth.net
http://mailman.qth.net/mailman/listinfo/1000mp