DB0FHN

JA1XFA > QRP      24.08.06 00:33l 31 Lines 991 Bytes #999 (0) @ WW
BID : 41145=JA1XFA
Read: GUEST HA1SE
Subj: TenTec 1340 VFO -> VXO
Path: DB0FHN<DB0MRW<OK0PPL<DB0RES<LZ4NY<YU7R<HG8LXL<7M3TJZ<JK1ZRW<JA1XFA<
      JA1XFA
Sent: 060824/0715I @:JA1XFA.13.JNET1.JPN.AS #:41145 [Iruma] MBX $:41145=JA1XFA

  MBX-RBBS Res-supporting tools. Ver 1.18b

 Dear QRP @ WW funs.

 I'm Using "TenTec 1340" Transciver QRV 40m Bands.
 It's a Very(?) QRH....(;_;)   Remake VFO!!

 I think.. VFO -> VXO!!!

   Vcc  -----+------+                Tune VR
             |      |                   |
             |    R47K                 R10K
       Q2    |      |  Ceramic          |
     2N2144  C      |   4MHz     MV209  |  18P
             B------+---|()|--+--|>||---+---||--- RIT
             E      |         |         |         Tune
             |      |         |         = MV209
             |      =100P   R100K       ^
             |      |         |         |
       +-----+------+        GND       GND
       |     |      |
       |    R2.2K   =100P         About 3,940KHz
      Out    |      |                       ~4,000KHz
            GND    GND

 Now diagram use ceramic resonance chip. (for 1-chip CPU)

 Freq 4,000~3,940KHz  Drift About 20Hz/Hour..VY FB!

 de JA1XFA @ JA1XFA.13.JNET1.JPN.AS
 


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