Does the relay click when the power comes on? Could the relay be stuck? On 28/02/2014 8:58 AM, Tayloe, Dan (NSN - US/Tempe) wrote:
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
