[Drakelist] R4A/B Push-Pull?
Is the audio in the R4A and R4B push-pull? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] SSB filter for the Drake R-4C.
Hello All I am looking for a 2.4 Khz. filter model 5049 for the R-4C receiver. Are someone able to help, and what is the price level for this type of filter ? Thanks in advance. Best regards Bent / OZ5ZD___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R4A/B Push-Pull?
-Original Message- From: Neil M Califano cchange...@yahoo.com Sent: Apr 25, 2011 1:29 AM To: Drakelist@zerobeat.net Subject: [Drakelist] R4A/B Push-Pull? Is the audio in the R4A and R4B push-pull? Both are single-ended conventional output. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] tr4 problem on 15 meters
Please let me know what the problem is, My TR4 recently will not work on 15 meters. First the calibrator produced a horrible noise, like buzzing, rasping, whatever, then the receiver produced the same type of noise whenever it came across a signal. I have replaced most all if not all condensers, could this possibly be that the 15 meter crystal is not working? Thank you in advance very much - WA2OVJ Karl ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] My sorry TR-3
Hi Gang, I must apologize. I've been corresponding with Garey for some time about the S Meter problem with my TR-3. We went through all the values, and readings throughout the circuit with only one minor abnormality, which I corrected to no avail. The next step was to trace out the entire circuit. About that time smoke was appearing. Burned the zeroing pot, and the 220 Ohm resistor at the meter. further circuit tracing brought me right to the meter itself. It is not open, just smoky and now bound up. I am fearful about installing a new meter not knowing the exact location of the short circuit. Not to mention that I don't have a spare. Thanks for reading this tom, WD8JPP ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] SPR-4 Loop Antenna
Pat: Try this link. 73, Tony N3WAK _http://www.dproducts.be/drake_museum/images/LA-4How_to_do.jpg_ (http://www.dproducts.be/drake_museum/images/LA-4How_to_do.jpg) ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] DSR-2
Does anyone know where I can get a DSR-2 serviced?? 73, Marty K2KGF ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] My sorry TR-3
- Original Message - From: pony...@aol.com To: drakelist@zerobeat.net Sent: Monday, April 25, 2011 8:37 AM Subject: [Drakelist] My sorry TR-3 Hi Gang, I must apologize. I've been corresponding with Garey for some time about the S Meter problem with my TR-3. We went through all the values, and readings throughout the circuit with only one minor abnormality, which I corrected to no avail. The next step was to trace out the entire circuit. About that time smoke was appearing. Burned the zeroing pot, and the 220 Ohm resistor at the meter. further circuit tracing brought me right to the meter itself. It is not open, just smoky and now bound up. I am fearful about installing a new meter not knowing the exact location of the short circuit. Not to mention that I don't have a spare. Thanks for reading this tom, WD8JPP The meter is probably shot, the high current will have swelled the insulation on the wire in the coil and probably also warped the coil. I suggest the following: first, if Garey has a disc for this unit it will have high res schematics in it. It should also have photos. I would print out the schematic very large. Kinko's or other service place can do this for a couple of dollars. Make more than one copy. Get a set of colored pencils or highlighters and trace out the circuit on the shematic. Drake schematics tend to look like maps of the Chicago frieght yards so its easy for your eye to loose its place. Once you have the circuit traced out check the physical wiring for a solder butch or flake or a bit of wire that has bridged something. If there are high res photos compare what's on them to what you see. The current has to be coming from somewhere. Disconnect the meter and see how much voltage is on the terminals, they may give you a clue as to the source. To burn out the zero pot and series resistor requires a fair amount of current. There are people who can repair meters but if the coil is burned as I suspect about the only choice you have is to replace it. I have not looked at the schematic myself so can't be more specific. The photos in Garey's discs helped me to discover the source of a completely frustrating problem in a T-4XB. Wiring which looked correct in the chassis turned out to be wrong. When changed to the way it was in the photos the thing worked. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Amp
Is the amp in the SW4-A push pull? What about the R4A and R4B? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Using T-4XB on 30 meters
I'm in the process of restoring a T-4XB and want to obtain additional crystals to tune the WARC bands. Reading through the T-4XB manual, I could use the group's help clearing up a couple questions about the correct crystal frequency to choose, and how the T-4XB might interact in transceive mode with the R-4B on the 30meter band. The T-4XB manual states that due to either lower than desired output or spurious emissions, certain frequencies should not be used, e.g. 10.5 to 12.0 MHz. Given the 30meter band is 10.1 to 10.15 MHz, on the surface this should not pose a problem. However, the crystal selection chart indicates between 9.0 and 10.5 MHz, depending on the crystal frequency chosen, there are numerous do not use between frequency segments. For example, for a useable frequency of 10.0-10.2 MHz, a crystal frequency of 20.8 MHz is recommended, but a 'do not use' range of 9.9-10.2 MHz is stated (outside the ham band anyway). In order to figure the correct operating frequency, one takes the dial frequency in KHz and adds it to 9.7MHz. --- which I believe means when the dial is at 400KHz, you're really at 10.1MHz. Also, assuming I can tune to 550 KHz on the dial, I should be able to tune the whole 30meter band. For those that use a T-4XB on 30meters, did I get this right? My R-4B, on the other hand, indicates to tune the 10.0-10.5 MHz range, a crystal frequency of 21.1 MHz is recommended. This may be OK for the receiver, but for the T-4XB, if a 21.1 MHz crystal is used, the recommended useable frequencies are from 10.25-10.5 MHz (outside the 30 meter band), with a 'do not use between' frequency segment of 10.1-10.25 MHz -- which includes part of the 30meter band! When pairing the R-4B and T-4XB for transceive operation on 30meterswhat is the correct manner to do this, and does the receiver governing transceive cause transmit problems in this band (given the receive crystal frequency is 21.1 and not 20.8 MHz)? If you want to transceive, does this mean only the transmitter should be used to determine frequency? Thanks for any practical experience and guidance offered. Phil, WA2CLX ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
