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   Home   Help Search  
Pages: [1] 2 3 4 5 6 ... 10 Next
 1 
 on: Today at 05:09:48 AM 
Started by KI7QS - Last post by K5RT
Did you replace the control cable? Or one of the connectors?

 2 
 on: Today at 04:51:09 AM 
Started by AB9DF - Last post by AB9DF
Thanks so much for all the feedback.  I am not sure of the make.  It very well might be a home brew or a kit.  The front of the radio says "Amateur Radio Receiver"  PRO-M78 (M).  this is all it says anywhere on the radio inside or out front or back.  I have googled and searched the internet sites but with no success.  It is a tube type radio so I would guess it was 50's or 60's.  If anyone would like me send photos I would certainly be willing to do so.  Just let me know.  It appears to be well built and perhaps is a military radio but it doesn't look like a military radio. 

 3 
 on: Today at 04:30:53 AM 
Started by KD6NRP - Last post by JS6TMW
You should have heard a ton of CW stations last weekend during the contest.

Steve in Okinawa

 4 
 on: Today at 04:23:53 AM 
Started by WY7CHY - Last post by W9IQ
Mike,

In response to your two rhetorical questions, of course they are approaching resonance. But now put the 4:1 balun in the system, and you will have a +4:1 SWR and the antenna system is still nearly resonant (ignoring the frequency shift that Zack pointed out) which exemplifies that resonance does not always equate to a 1:1 SWR. However, the converse is true: a 1:1 SWR means the antenna system is resonant (at the specified measurement impedance of the SWR instrument).

- Glenn W9IQ

 5 
 on: Today at 03:24:42 AM 
Started by N2SLO - Last post by K3TN
Echo K9NW's comments - plus, those rules are the same for ARRL HF contests, too, and also for most (if not all) other contests, like all the CQ contests.

The NIL thing does kinda suck when it works the wrong way, but the majority of Not In Logs are legitimate errors by the station that got hit with the NIL. Usually when you are calling at the same time as someone else and didn't catch initially that he did *not* come back to you.

Not always - I've had someone not log me twice in a contest because he mistakenly thought I wasn't following the rules. But, that's been the anomaly.

73 John K3TN

 6 
 on: Today at 02:59:15 AM 
Started by VA7CPP - Last post by VK3BL
Given the tiny size (and plate spacing) of the air variables I can't imagine it would put out more than a few hundred watts, or be very tolerant of loads other than 1.5:1.


 7 
 on: Today at 02:46:20 AM 
Started by W8HDU - Last post by M1BTI
Sprayed my diamond triband matt black aound 5/6 years ago with no issues. You'll need to lightly paper the glass to get a good bond for the paint.

 8 
 on: Today at 02:25:45 AM 
Started by W5WSS - Last post by W9RND
How about having vanity call signs going to the highest bidder?  

having the vanity call signs go to the longest licensed ham makes more sense, but the FCC would need the CIA or NSA to help them rebuild such a database, since they lost the old records...


 9 
 on: Today at 02:01:33 AM 
Started by W3WN - Last post by KI7AQJ
Well sh*t! I'll sure miss that ring down kit!

 10 
 on: Today at 01:51:03 AM 
Started by KC8MWG - Last post by KC8MWG
You can run PowerSDR in demo mode without having a radio in order to get a feel for it.

The transverter will simply connect to the SDR radio antenna jack (on 10M) and the 2M antenna. You may also need a PTT connection between the radio and the transverter.

Thanks! Okay, is there a way to get PowerSDR to read the correct frequency for 2m? Or is that a "do the math" sort of thing? And if it does have to be calculated out, please pardon me if this seems like a dumb question (math has never been my strong point... Tongue ) - what is the calculation? If the IF is 28MHz to get 144MHz out, what, for example, would the IF have to be to get 146.68 MHz out, and how do I calculate that? Or any other frequency for that sort of setup?

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