Hi Steve, On the question of the jump in frequency, this is not normal. What is normal is for there to be a shift in the spectrum of the background noise every...
Steve, I retract my first sentence - maybe it is normal that the tuning step is inconsistent. I have been listening to the heterodyne of WWV as I fine tune...
Hi Tom, I will check the adjustments you gave. I have not turned anything, I have the equipment, knowledge and experience to do so when I get a achematic, but...
Steve, I agree. You'll find the 1st LO circuit in the partial schematic I accidentally uploaded a few days ago. On further research, getting consistent step...
Hello My big knob problem (doens't matter if I turn Clockwise or Counterclockwise it's going down)still continues. Radiosahck.ca refuses to react on my...
Tom is correct about the operation of the 50Hz tuning mechanism of the 2nd LO. The problem in attempting to calibrate either the USB or LSB zero-beat...
I've been going over the schematic, circuit description and alignment procedures in the original service manual and will share my interpretation of how it...
I just started playing around with decoding RTTY, and like it so far. I have been trying to find some RTTY news services, but haven't had any luck so far. I...
Here's a non-scientific comparison that I did. I recently bought a Kenwood TS2000, their top of the line all band receiver. I guess that the T870 might be...
This is to welcome Frank to the group. He is the author of all or most of the popular modifications to the DX-394 that were published originally some 3-4 years...
Hi all! I've been a member (#109) of this group for just six weeks, having found it shortly after buying the DX-394 in the Canadian clearance. Since then,...
I want to thank all of you for the welcome to the group. I wish this group had been around when I first bought a 394 years ago. Dispite the sometimes rabid...
Here's another tidbit that may help. IF you have ever connected a long wire antenna to the 394 whip and then tried the antenna in the normal high-Z antenna...
... I'll do one better than that in a couple weeks when things settle down around here I will take pic's of all my radios and were they are used.. Legend56bc...
Here's a fun thing to do if you don't mind losing all your frequency and clock settings. To see all the segments on the LCD screen at one time: 1. Press and...
In a prior posting I said: "To optimise the 2nd LO for highest accuracy and linearity is likely going to require a number of measurement, adjustments, possible...
Hi Group: Something that I discovered when I first got the radio and before I did the "purple wire" mod was that if you used the line out and ran it into an...
Hi Group, A possible avenue of exploration this fall and winter will be the Digital Radio Mondiale experiments on HF by a number of broadcasters, including...
Hi Everyone, I don't understand the use of Standby mode in Radio Shack DX-394 receiver. When we change to standby mode all operations are locked with no audio...
Standby is used if your using a transmitter in conjunction with the receiver to prevent large amount of RF going into the receiver and blowing the front end....
Is anyone familiar with FTV software. http://www.geocities.com/SiliconValley/2504/ will it or should it work on the dx-394 ? Ive got my radio hooked to my pc...
In addition, standby mode has the following benefits for ham radio operation: 1.. Mutes loudspeaker so that there is no feedback into the transmitter...
Hi Kent, I'm not familiar with FTV but have used other software for SSTV (MMSSTV), RTTY and PSK (TrueTTY) successfully with audio fed to the computer sound...
Help wanted! I have been thinking about doing a PC remote control for the DX-394, inspired by Russ Hellar's original work (see Files section) and Laurent...
I am not sure because I have not looked inside this radio myself, but it looks to like you have an encoder problem. The fix is to replace the encoder of the...
Hello I allready experiment this problem when I modify my dx394 for rs232 interface... I broke one leg of the encoder when I unsoldered it. Frequency was...
Hi Tom ! Concerning the schematic of the rs232 mods, the digital part is ready, still to scan the paper to jpg format... The interface between the digital part...
Hi All, Especially to those interested in tinkering and how things work. I started a folder entitled 'Component Data Sheets' in the Files section of the...
