Hi, I picked up a Brandywine GPS Master Clock today at a hamfest and am hoping to get it working. It came with a 3-ring binder with dip switch settings and ASCII command descriptions. Based on prior postings, it seems like it's serial port behaves a lot like their GPS-4 model. My unit had a bad DC to DC converter, so I bypassed it and am running the thing off a 15V DC supply at least for now, measuring 5VDC out of the little switching regulator, and 11.5 out of the 12VDC regulator. I suspect there may be something wrong with the GPS module, but would welcome feedback from group members. I have tried both the GT1M "High Gain Amplified GPS Antenna" that I received with this, and a GAA3 2.5-12V "Active L1 Band" antenna, with the same results. This unit is pristine looking, like it was never used or messed with. It came with a beautiful TrueTime RD-2 IRIGB display. Here is what I get on the serial port (just pins 2,3, and 5 connected). ----------------------------------------------------------------------------- L=load ESC=RUN..... Set/Clr RAM Set DUART TFS Ltd C Tue Nov 22 2005 21:05 support@timefreq.com Testing IC19 RAM...PASS DFLTS->RAM Testing ROM/FLASH......PASSED Cksum = 37BC Testing Indicators........ Osc is BW 5P XTAL1 Cal found Set PLL...PLL OK Slope Pos TC1=AFNOR TC2=as TC1 Pulse 1 msg: $PRCCG,C,U000000,+100*65 Pulse 2 msg: $PRCCG,K,UXXXX00,+100*6D TimCod msg : $PRCCG,E,5,1,2,3*29 Offset msg : $PRCCG,O,U,+00:00*62 Alarm Masks 1234 5678 1111 0000 Posn Ave ON Set Timers Run GPS4 EGPS31F t00:00:04.170 01/01/04 001 4 5 t00:00:05.315 01/01/04 001 4 5 a $PRCCG,A,31F,00:00:05,01/01/04,5,0,1,0000,00*59 e $PRCCG,E,5,1,2,3*29 f $PRCCG,F,+0,+0,+0,+0,+1.4E-9,+0.0E-10,001:00:00:00,+69.7,60,04,09*03 h $PFEC,GPanc,,*47 l $GPGSV,1,1,00*79 n $PRCCG,N,31F,-----------,00*62 p $GPGGA,,,,,,0,,,,M,,M,,*66 s $GPRMC,,V,,,,,,,,000.0,W*48 t00:00:07.252 01/01/04 001 4 5 t00:00:07.659 01/01/04 001 4 5 ----------------------------------------------------------------------------- -- Mark G. Thomas (Mark@Misty.com), KC3DRE

Hi again, As best I can tell the FURUNO GT-80 GPS module in my Brandywin GPS-4 is bad. The module says: GT-80B5F Does anyone have any suggestions for fixing or replacing the GT-80 ? Mark On Sun, Oct 01, 2017 at 06:27:48PM -0400, Mark G Thomas wrote: > Hi, > > I picked up a Brandywine GPS Master Clock today at a hamfest and am > hoping to get it working. > > It came with a 3-ring binder with dip switch settings and ASCII command > descriptions. > > Based on prior postings, it seems like it's serial port behaves a lot > like their GPS-4 model. > > My unit had a bad DC to DC converter, so I bypassed it and am running the > thing off a 15V DC supply at least for now, measuring 5VDC out of the little > switching regulator, and 11.5 out of the 12VDC regulator. > > I suspect there may be something wrong with the GPS module, but would > welcome feedback from group members. > > I have tried both the GT1M "High Gain Amplified GPS Antenna" that I received > with this, and a GAA3 2.5-12V "Active L1 Band" antenna, with the same results. > This unit is pristine looking, like it was never used or messed with. > It came with a beautiful TrueTime RD-2 IRIGB display. > > Here is what I get on the serial port (just pins 2,3, and 5 connected). > > ----------------------------------------------------------------------------- > L=load ESC=RUN..... > Set/Clr RAM > Set DUART > TFS Ltd C Tue Nov 22 2005 21:05 > support@timefreq.com > Testing IC19 RAM...PASS > DFLTS->RAM > > Testing ROM/FLASH......PASSED Cksum = 37BC > Testing Indicators........ > Osc is BW 5P XTAL1 Cal found > Set PLL...PLL OK Slope Pos > TC1=AFNOR TC2=as TC1 > Pulse 1 msg: $PRCCG,C,U000000,+100*65 > Pulse 2 msg: $PRCCG,K,UXXXX00,+100*6D > TimCod msg : $PRCCG,E,5,1,2,3*29 > Offset msg : $PRCCG,O,U,+00:00*62 > Alarm Masks > 1234 5678 > 1111 0000 > Posn Ave ON > Set Timers > Run GPS4 EGPS31F > > t00:00:04.170 01/01/04 001 4 5 > > t00:00:05.315 01/01/04 001 4 5 > a > $PRCCG,A,31F,00:00:05,01/01/04,5,0,1,0000,00*59 > > e > $PRCCG,E,5,1,2,3*29 > > f > $PRCCG,F,+0,+0,+0,+0,+1.4E-9,+0.0E-10,001:00:00:00,+69.7,60,04,09*03 > > h > $PFEC,GPanc,,*47 > > l > $GPGSV,1,1,00*79 > > n > $PRCCG,N,31F,-----------,00*62 > > p > $GPGGA,,,,,,0,,,,M,,M,,*66 > > s > $GPRMC,,V,,,,,,,,000.0,W*48 > > t00:00:07.252 01/01/04 001 4 5 > t00:00:07.659 01/01/04 001 4 5 > ----------------------------------------------------------------------------- -- Mark G. Thomas (Mark@Misty.com), KC3DRE