I have noticed on my (tr)USDX with classic RF board a carrier wave at the frequency set that is noticable on the higher bands starting at 14.06MHz -53dBm and increases upto -43dBm at 28.06MHz. This is the same for all modes.
Using the same main board and a Lo RF Board, it is noticeable at 10MHz -60dBm and at 14MHz -56dBm.
I understand at these low levels of RF o/p there it is unlikely to be a nuisance to others, but is this an artifact of the design or a problem with my build?
Many thanks in advance for anyone who can answer this.
73 M0PWV
Carrier Wave TX without PTT
-
- Posts: 20
- Joined: 07 May 2023, 12:14
- Location: Elizabeth City, NC, USA
Re: Carrier Wave TX without PTT
I’m interested in this issue, as my recently purchased classic kit seems to have a similar but much more pronounced issue with this. It’s constantly radiating when sitting idle, and pressing the PTT on 10M SSB produces a terribly garbled and weak transmission.
I’m planning on upgrading to the new 1.2 main board, which one do you have?
I’m planning on upgrading to the new 1.2 main board, which one do you have?
-=-=-=-=-=-=-=-=-=-=-=-
DE KO4PCX
DE KO4PCX
-
- Posts: 15
- Joined: 03 Jan 2022, 15:32
Re: Carrier Wave TX without PTT
I have the 1.0 board. My TX on 10m seems fine. I perhaps should of added to my previous post I am using a TinySA to make my measurements.
-
- Posts: 20
- Joined: 07 May 2023, 12:14
- Location: Elizabeth City, NC, USA
Re: Carrier Wave TX without PTT
I’m even more interested in this thread than before, since my PA FET blew up while I was *listening* (not transmitting!) last night. A new v1.2 main board and FET are inbound right now, thanks to Sunny. I’ll let you know if this changes the situation.
-=-=-=-=-=-=-=-=-=-=-=-
DE KO4PCX
DE KO4PCX
Users browsing this forum: No registered users and 7 guests