Rob Lenski




My contest set for this year is Rockey’s Pentode-Triode set from his book on regenerative receivers. It uses a metal cased pentode (6SK7) for the detector, and a 6J5 for the amp. The set is fairly straight forward to build, and uses relatively few parts. One nice feature of this set is that no interstage transformer or choke – both of which can be somewhat hard to find – are required. Another distinctive feature is that this set uses cathode tap coils rather than a coil with a separate main and tickler coil.

While the set can be run off of a 6V battery for the filament and 10 – 12 nine volt batteries for B+, it works even better when you use a power supply to deliver 200 – 300 volts of clean, filtered DC.

This set was easy to build and has given me very little trouble. You could also use the 6AC7 tube for the detector. Pinout is the same as the 6SK7. The 6AC7 is a very inexpensive tube, but is a little noisier.



Log

Time is GMT.
Location: Michigan

    Contest log for SW Class
     
     #     Time  Freq.   Station
  7-26-08 
     001   9:27 p.m.   3330     CHU
     002   9:29 p.m.   3185	WWRB
     003   9:53 p.m.   5875     WHRI
     004   9:55 p.m.   5890     VOA
     005   10:00 p.m.  5920     WBOH
     006   10:08 p.m.  5950     Radio Taiwan Int'l
     007   10:11 p.m.  6000     Radio Habana Cuba
     008   10:19 p.m.  6180     R Nacional da Amazonia

08-02-2008
     009   8:00 a.m.   9570     China Radio Int'l 
     010   8:15 a.m.   9650     KBS World Radio (S. Korea)
     011   8:17 a.m.   9580     Radio Australia
     012   3:15 p.m.   9565     Radio Habana Cuba
     013   3:20 p.m.   13690    WYFR
     014   3:25 p.m.   9495     TWR
     015   3:45 p.m.   11990    Radio Kuwait
     016   3:51 p.m.   9840     WHRI
     017   3:56 p.m.   9370     WTJC
     018   3:57 p.m.   9980     WWCR
     019   4:01 p.m.   9515     Germany Pan American BC
     020   4:18 p.m.   11885    WHRA
     021   10:42 p.m.  9700     Radio Bulgaria
     022   10:45 P.m.  9480     Voice of Russia
     023   10:49 p.m.  9665     Voice of Russia
     024   10:51 p.m.  9680     Radio Taiwan Int'l
     025   10:54 p.m.  9265     WINB
     026   10:58 p.m.  9505     WYFR
     027   11:02 p.m.  9690     China Radio Int'l
     030   11:09 p.m.  9625     Canada CBC NQ SW Service
     031   11:13 p.m.  9860     Voice of Russia
     032   11:20 p.m.  7440     Radio Ukraine Int'l
     033   11:23 p.m.  6175     Voice of Vietnam
     034   11:26 p.m.  6180     Radio Habana Cuba
     035   11:33 p.m.  6080     Radio Prague
     036   11:43 p.m.  7385     WHRI
     037   11:49 p.m.  6040     Vatican Radio

08-03-2008
     038  12:14 a.m.  10000     WWV
     039  12:16 a.m.  5000      WWV
     040  7:06  a.m.  5955      Radio Netherlands
     041  1:30 p.m.   11785     WEWN
     042  1:35 p.m.   9980      KSDA Guam Adventist World Radio
     043  7:06 p.m.   6090      World University Network Anguilla
     044  7:08 p.m.   6145      China Radio Int'l
     045  7:13 p.m.   7315      WHRI
     046  7:21 p.m.   11700     Radio Bulgaria
     047  7:23 p.m.   9550      Radio Habanna 
     048  7:31 p.m.   11740     WYFR
     049  7:37 p.m.   9420      Voice of Greece
     050  7:38 p.m.   9925      Crotian Radio
     051  7:40 p.m.   9875      Radio Vilnuis Lithuania
     052  7:43 p.m.   12020     Voice of Vietnam
     053  7:57 p.m.   4160      WWCR
     054  8:03 p.m.   6145      NHK Radio Japan
     055  8:06 p.m.   6020      China Radio Int'l
     056  8:47 p.m.   9280      Radio Cairo
     057  8:53 p.m.   9845      Radio Netherlands
     058  8:57 p.m.   9440      Radio Slovakia
     059  9:01 p.m.   9620      Voice of Turkey
     060  9:30 p.m.   6010      Radio Sweden 
     
08-04-2008
     061  8:01 p.m.   7333      CHU
     062  7:57 p.m.   5850      WHRA
     063  8:07 p.m.   6055      Spain Radio Exterior Espana
     064  8:14 p.m.   9640      Germany Pan American Broadcast
     065  8:19 p.m.   11790     Radio Romania Int'l
     066  8:22 p.m.   7465      WWCR
     067  8:37 p.m.   9390      Radio Tirana Albania

08-05-2008
     068  5:25 a.m.   5890      WWCR

Identified later

07-26-2008  
     069  9:49 p.m.   5745      WHRI
     070  10:05 p.m.  5935      WWCR
   
08-02-2008 
     071  10:19 p.m.  7385      WRMI