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Correction -- My unit is not illegal on all bands. Spectrum Analyzer output for each band can be found in the Photos section at?/g/BITX20/album?id=65861. Here is the summary: 80

Warren, Not for harmonics.? The spur issue took precedence. They were shared in other message threads here. The spur issue was discovered during power amp improvements. IT was announced here in the

This picture shows the 2 way pins can be soldered reverse on the nano, i choose the first one (not on the desktop) leaving plastic on the CH340 side, it allow using the nano either normal or reverse

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* ubitx_cat.ino_modified_KD8CEC_F1MQJ.txt *Uploaded

Hi Eddie, it is hotmail.com. so it is Ian.radio workshop@ hotmail.Co.UK. Regards. Ian M0IDR Get Outlook for Android<https://aka.ms/ghei36> ________________________________ Sent: Saturday, August 4,

Ian, Thanks, I think the usb lead out the back is the plan.? Didn't get the pot pic.? Or haven't found it yet.? Yes, the shaft on Sunil's pot is too small for the knob.? Did you remove his power

Ian, the list server deletes emails.? What is your domain after the @ xxxxx.yyy Thanks. Eddie

My unit puts out illegal harmonics on SSB on all bands below 20 meters. WA8TOD

Thanks, Ian.? Got it.? Eddie

Terry, You need a separate band pass filter for each band if you want to use the single conversion BitX40. The UbitX uses double conversion that eliminates that requirement. You could use a multiple

A search within yahoo groups and groups.io for "antennas" finds dozens of such groups. Also also some in the www.arrl.org forum, and forums.qrz.com forums, among others. Some with one or two members.

Mike, You solved the source issue.... with the counterpoise as suggested I did say the SWR will likely change. Generally the 1:9 scheme is problematic for RF in the shack unless you have luck or

This is primarily an SSB transceiver, and harmonic suppression seems adequate in that mode on the stock rig.? Best and easiest fix is probably to either not use CW mode, or do a minor hack to move

Iz oos, TLTs can be made with low loss.? ? However making a matched set may be harder as they have to have the exact same phase response. Also the 1:9 is 450 ohms? (50*9). Allison

Make sure you have adjusted the BFO to the correct frequency.? The carrier will drop. Allison

Allison Have you shared your past findings here? I did a search and found nothing but I could have missed it. It would seem to me that if you knew the product was illegal for use on the air you would

Warren, Latching relays have a higher cost, I like the idea though.? However there are lower power relays that would do the job.? Since the radio eats power on TX anyway another 200ma is tolerable.

Arv, For bitx20 (or 40) a monoband radio traps and Caur filters are a good solution. For a multi band radio its a spot solution that is likely to case troubles on other bands. The fundamental issue

Warren, In my testing I also found the isolation across one relay was barely 45db in one configuration and 50 in another. Using one relay to switch both ends of a filter will compromise the filter

I am not sure Arv. The real solution here is like a "fork lift" upgrade, replacing everything after T11 in the transmit chain. If I were doing a redesign I would use the same four filters, add five