Got it Clint, now is the band stop filter in software, within SW2 or are you switching hardware in/out?

I have for sale FDM Duo ( Red ) plus a Hardrock 50 PA including integrated ATU . This one is from garden shack so is not used as much as the DUO in my PC room. As I stated in my last post proceeds go

Hi Patrick, My band stop filter notches out all frequencies in the range of 550 KHz to 1600 KHz. A high pass filter would also work to get rid of the AM broadcast station overload, but I wanted

Dose this work on others radios on mine all the audio is distorted no matter were the slide control sits .

Hey Clint, thanks for responding. Gosh with so much crowding during field day I don't think I could answer those questions. I see the ADC flash now and then, always have, I thought I heard that was

AH-HA____ Missed that. 192 + rssi etc. or 0x32 + .... and just checked the vol. settings and other bytes and yes, it's all been carefully thought-out to avoid 0x01 31 and 0x00 30 sequences -

Hi Andy, for the sketch length the problem is not only the buffer length (see later) but also variables and code itself. For the buffer: sometimes the protcol has been modified, and it is possibile

Hi Neil, your explanation is perfect, both in BlueDUO and other projects I don't have problem with sincronization, even if I start serial progam, and receprion, at "wrong time". Giovanni - HB9EIK

The values in the 1024-byte spectrum have a range of 50 to 255 decimal, so you can't get a value lower than 0x32 as part of the spectrum, so the spectrum control block header pattern and

Having looked at the EXTIO protocol I'm now a bit confused. There is an attempt to make a header for Spectrum and Parameter data , 0x00 30 [30 30 34 30] and 0x01 31 [3F 31 30 30] respectively,

Hi Patrick, If the problem signal was adjacent band, then external band pass filters will most likely help. You need to know the source of the signal that was causing the problem. If the signal

Greetings! Hey I started out using the FDM DUO for Field day, almost all CW. Had to stop because with so much traffic something was creating a lot of phase noise, or just overload of some kind. Have

How did you open the fuse cap? Did you use some type of sharp object to remove it? Mine will not remove by just pulling or pressing it. I am afraid of damaging it if I use a screwdriver or needle nose

Ah ok!!!! Then u need an active loop antenna..lz1aq amp design is GOOD Use 4 square loops plus one set at 90 degrees to get 90 degree steering..and also a preferred homebrew noise canceller/

When using alias products on receive, ( eg at 144MHz), what does the level meter show when set to dBm ? ie. does it automatically take into account the SINC(X) loss Andy www.g4jnt.com

I have just connected up CAT & TX USB to my iMac, and am running Blackcat Systems SSTV app. Pictures are coming in fine on 14230kHz even among the wild SSB contest calls. So I thought I would try to

Simon, That's with the dummy load... just internally generated noise! Quite noisy on my vertical - S6-S9 on 40M ! 100ft from the main road intersection, street lights, power lines, traffic lights,

-120 envious!!!

Bob, That helped a bit.. My DUO has a noise floor at about -120dBm With my QTH and antenna I'm probably never going to get a signal above -30dBm. I was trying to set those limits.. Had a stab at it

Yes it is a bit tricky but my notes say that 'Lev' sets the top line of the display. Hope that helps Bob G3PJT