--- In [email protected], "Eric" <ve2...@...> wrote: > > Hello, > > I have an 30w UHF MSR2000 that was previously on 414/419MHz. With a new set > of crystal for the ham band, I need 2.8µV at 447MHz to open the receiver. > > Is there a way to improve this, or a way to modify the preselector / > injection. filters ? > > Maybe the easiest way is to find a receiver/exciter boards for 450-470MHz on > ebay but unfortunately most sellers won't ship in Canada. > > MSR2000 model: ACC44KSB1100AT > RECEIVER: VRE4001B/38 > > 73 Eric VE2TSO > Quebec >
Finaly I modified the preselector coil and cut 1/2 turn on each preselector/injection coil. Now the receive opens with a 0.5µV signal. Not bad.... Now I'm trying to configure the MSR2000 as a repeater with the original PL board TRN5073A but I need help. I have the following card: SQ GATE, STATION CONTROL, R1 AUDIO, PL and TIMEOUT TIMER I tried different jumper configuration and it works fine on carrier squelch but not in PL mode. Backplane: JU1, JU4 AND JU5 are IN SQ GATE: JU14 ON PL, JU15 ON CS STATION CONTROL: JU9 IN R1 AUDIO: JU104 OUT, JU105 IN (COS AND PL MODE) I can read 7.7Vdc on P15-5 when PL is present (which is the RX PL indication) but the TX won't transmit. When I put JU14 on CS (SQ GATE), the repeater works CS but no audio pass through. If the proper PL is present at the RX, the audio will pass throught right Any ideas how to have the PL works properly ? thank's Eric VE2TSO
