Does having the input at ground turn off the transmit? If so, how about a 4.7K series resistor and then a 4.7K from the base to ground. Sometimes the digital output of a CPU simply will not go low enough, so a resistive divider is need to help turn off the transistor. - Dan -----Original Message----- From: minima-bounce@xxxxxxxxxxxxx [mailto:minima-bounce@xxxxxxxxxxxxx] On Behalf Of ext jerry@xxxxxxxxxxxxxxxx Sent: Friday, February 28, 2014 12:25 AM To: minima@xxxxxxxxxxxxx Subject: [minima] Re: Stuck in Transmit This has really got me stumped. I changed the Q23 resistor back to a 4.7k and added a 10k pullup resister from pin 5 on the micro to ground. no luck. If I disconnect the R/T line from the main board the LCD switches to RX. When the pin 5 R/T line is Hooked to the main board it switches to TX. With the 47k resistor I had .586 on the base of Q23, with the 4.7k I have .576 on the base. All the functions of the FN button work good. It toggles the R.I.T, it swaps the VFO, It resets the VFO. I have 5v on the Key pin and 5v on pin 5. The tuning works great. The digital board seems to be fine. I don't know what to do next. Jerry K5LRU Harwood, Texas > -------- Original Message -------- > Subject: [minima] Re: Stuck in Transmit > From: Mark G0MGX <mark.g0mgx@xxxxxxxxx> > Date: Thu, February 27, 2014 2:10 pm > To: minima@xxxxxxxxxxxxx > > > Did you implement the pull-up recommended by Farhan? > > I measure 0.7V on the base of Q23 when in RX, but mine is without the > pull-up and with a 47K so probably not the best comparison! > > M > > > On 27/02/2014 18:22, jerry@xxxxxxxxxxxxxxxx wrote: > > I took Farhans advice and went over every trace on my digital board. > > Cleaning between traces under a microscope and now I have 5v on pin 5 of > > the digital board. My display reads: A= 14,2000 RX. And the second line > > reads: USB RX 0t!. But I'm still stuck in transmit. I measured the > > voltage on the 47k resister feeding the base of Q23, on the digital > > board side it is 3v on the base side of Q23 it's .57 Should I change > > that back to a 4.7k? What should the voltage be at that point? Jerry > > > > K5LRU > > Harwood, Texas > > > >> -------- Original Message -------- > >> Subject: [minima] Re: Stuck in Transmit > >> From: farhanbox@xxxxxxxxx > >> Date: Wed, February 26, 2014 12:20 am > >> To: minima@xxxxxxxxxxxxx > >> > >> > >> Jerry, it is quite probable that 5 pin is shorting to the ground. Look > >> very carefully. > >> > >> - f > >> > >> Sent from BlackBerry® on Airtel > >> > >> > >> > >> -----Original Message----- > >> > >> From: <jerry@xxxxxxxxxxxxxxxx> > >> > >> Sender: minima-bounce@xxxxxxxxxxxxx > >> > >> Date: Tue, 25 Feb 2014 23:17:50 > >> > >> To: <minima@xxxxxxxxxxxxx> > >> > >> Reply-To: minima@xxxxxxxxxxxxx > >> > >> Subject: [minima] Re: Stuck in Transmit > >> > >> > >> > >> Is there supposed to be 5v on pin 5 of the digital board? I have 5v on > >> pin 2 but nothing on pin 5. I tried the pullup resistor, didn't work. > >> I changed the 4k7 to 47k on Q23, didn't work, still stuck in transmit. > >> Jerry > >> > >> K5LRU > >> Harwood, Texas > >> > >>> -------- Original Message -------- > >>> Subject: [minima] Re: Stuck in Transmit > >>> From: Thomas Sarlandie <thomas@xxxxxxxxxxxxx> > >>> Date: Mon, February 24, 2014 8:48 pm > >>> To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx> > >>> > >>> > >>> What happens if you remove the wire from the T/R pin? > >>> > >>> Are you sure the PTT button is not stuck pressed or something like that? > >>> > >>> There are two things that can switch the minima in transmit: the ptt > >>> button > >>> being pulled to ground (pin 5 of the arduino) or the cw key being pressed > >>> (pin 24 of the arduino). > >>> In normal rx configuration, both should be at +5V thanks to the internal > >>> pull-ups resistors. > >>> > >>> thomas > >>> > >>> > >>> On Mon, Feb 24, 2014 at 5:52 PM, <jerry@xxxxxxxxxxxxxxxx> wrote: > >>> > >>>> I finished my MB and hooked it to the controller. I connected the tune > >>>> control to the control board and wired 12v to controller and 12v to the > >>>> MB. I wired a switch to the Fn control pins, I wired the BFO pin on the > >>>> MB to the BFO pin on the control board. I wired the T/R pin on the > >>>> control board to the R/T pin on the MB. I wired pin 11 on the control > >>>> board to the LPF pin on the MB. I left all the other pins on the control > >>>> board empty. My LCD on power up reads: A 14,200 2 > >>>> USB TX 0 > >>>> I have power to the TX side of the MB. But pressing the FN does > >>>> nothing. I can tune up and down freq., it changes from USB to LSB at > >>>> the right times. but won't come out of tramsmit. Any ideas. > >>>> > >>>> K5LRU > >>>> Harwood, Texas > >>>> > >>>> > >>>>