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Small problem on 20M #ubitx

Neil Goldstein
 

Hi all, 

I have been using my uBITX in a case I purchased from Carl Beck, W5BEK.
I love the radio!

I have one issue going on.  When I transmit on 20 Meters the Raduino switches into menu mode (Band Select)
I'm sure this is a wiring issue, and I probably need to clean up the cross-wiring internally, but it's tough with the cross-connects between some of the components.  I am using VERY short wires to the antenna connector. 
My question to the group is: What should I do from the following list, or all of them, or anything else?

  1. Use shielded wire bundles to all of the pots and connectors (All Electronics has some nice shielded wire bundles in 2, 3, 4, and 5 conductors)
  2. Use some RG-174 to the antenna connector (about an inch, currently just wire)
  3. Tie all grounds together with the copper tape on the insides of the case
  4. Devise some sort of shield around the raduino

Thanks in advance

--Neil, W2NDG

 

Hi Neil,

I have the same problem when transmitting on my 20 meter EFHW antenna. The problem is too much RF near the radio. If you install a 1:1 common mode filter choke on your antenna feed line that will keep the RF from coming back down the feed line and into your radio. Also make sure your SWR is low. Until the weather warms up I can't use my 20 meter antenna on my uBixt. BTW, I have this problem on other radios in the shack also, not just the uBitx.

Joel
N6ALT

John P
 

On Sat, Mar 3, 2018 at 06:34 am, Neil Goldstein wrote:
(All Electronics has some nice shielded wire bundles in 2, 3, 4, and 5 conductors
Neil, I've been looking for something along those lines, can you post a link or email it to me at my call sign at ARRL.net?
 
--
John - WA2FZW

Neil Goldstein
 

John, 

Here's the page with the multi-conductor cables:

https://www.allelectronics.com/category/825600/wire/cable/multi-conductor/1.html

Randy
 

Cut open an old printer USB cable if you have one lying around. It is 4 wire shielded.

Randy

Michael Hagen
 

All Electronics is a great place!

You don't have to call them, fill out anything!

If you don't like what you got, send it back.

I have been a customer for at least 30 years!

They have been there a LONG time.

Mike, WA6ISP


On 3/3/2018 5:26 PM, Neil Goldstein wrote:
John, 

Here's the page with the multi-conductor cables:

https://www.allelectronics.com/category/825600/wire/cable/multi-conductor/1.html

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
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