Would you like to react to this message? Create an account in a few clicks or log in to continue.
Welcome to the Charlie Tango DX Group. The home of ALL things Radio - CB, 11m DX, Amateur, PMR446, PLD, Network and Data. We welcome all radio enthusiasts of all knowledge levels. Join today and claim your own unique World Famous CT Call-sign
Starting December 1st - March 31st - 11m Winter Challenge, now taking names, come join us
Call Sign : m3kbd/2e0kbd/m0kbd Posts : 142 Times Thanked : 2 Join date : 2019-07-04 QTH or Location : stockton on tees Equipment Used : kenwood ts 2000x ascom 70mhz icom vlf/hf/uhf receivers multiband antennas Age : 64
Subject: crt 6900n bad tx audio Wed May 19, 2021 9:12 pm
hi i have a new crt 6900n i bought it a few years ago 10 meters now open i had difficulty getting a contact i worked a dl station who told me my audio was very bad i tryed the menu settings still distorted audio on all phone modes i bought it from knights a few years ago and it had a fualt so sent it back it cost me 20 quid so when it came back it was on 27mhz after a phone call and a look around sites i got the key in details on the key pad i thought ok not used so i fired it up last week distorted audio any ideas so my ts 2000x in line now no probs thanks for looking stay safe get on 28mhz 73s paul m0kbd
rabbi likes this post
Northern Crusader Major contributor
Call Sign : M0GVZ / 26CT1760 Posts : 503 Times Thanked : 35 Join date : 2019-11-13 QTH or Location : IO94SA Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike Age : 53
Subject: Re: crt 6900n bad tx audio Thu May 20, 2021 2:12 am
Overdriven mic gain or you've got common mode RFI on the coax due to a lack of decent RF ground at the antenna and any RF choking on the coax going to it.
rabbi likes this post
SangueG Major contributor
Call Sign : 26-CT-3971 / 2E0LMI Posts : 998 Times Thanked : 61 Join date : 2021-01-30 QTH or Location : Cirencester, Gloucestershire Equipment Used : Little radios, home-made antennas
Subject: Re: crt 6900n bad tx audio Thu May 20, 2021 7:30 am
Did the station describe your audio, e.g. did it warble, or was it muffled etc? As well as the above suggestions, could be the PSU. If not enough power to drive it audio can warble.
What mic using? I know many people swap out the stock mic as it does seem a bit of a cheap afterthought by the manufacturer. I still use the stock one mostly, and whilst it's no studio mic, it's doing the job with no complaints. Have removed the foam insert, set the mic gain to 57, and talk a couple of inches from it.
Depending on the radio version you can set the talk back to to listen your mic. Not written in all versions of the manuals.. Long press on the function button then short presses of it until you see 'n09', use channel knob to adjust the talkback volume between 'off' and volume '63'. Hope that helps.
rabbi likes this post
Alan Pilot Major contributor
Call Sign : 163-CT-220...MW7TTA Posts : 2351 Times Thanked : 60 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 149
Subject: Re: crt 6900n bad tx audio Thu May 20, 2021 8:17 am
Call Sign : m3kbd/2e0kbd/m0kbd Posts : 142 Times Thanked : 2 Join date : 2019-07-04 QTH or Location : stockton on tees Equipment Used : kenwood ts 2000x ascom 70mhz icom vlf/hf/uhf receivers multiband antennas Age : 64
Subject: crt 6900n Thu May 20, 2021 8:45 am
hi thanks lads for your reply i will do a through cheek out on all aspects of this crt 6900n 28mhz rig as you say it must be the mic the other kpo mic i bought from knights is not a power mic i will test it fully today when i think back to cb days the turner expander wow was that loud and some folk used them with a mellos echo box stay safe get on 10 meters whill it is still open paul m0kbd 73s
Today at 6:49 am by bobbyssantaponsa
Subject: crt 6900n bad tx audio 
