Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: Prev 1 2 [3] 4 5 6 7 8 ... 10 Next
 21 
 on: Today at 05:05:17 AM 
Started by KJ4SKP - Last post by KJ4SKP
I have a Yaesu 8900 and Diamond CR8900 antenna that I have used in my car for a couple of years.  A few days a go I noticed the antenna mount was loose and missing 2 set screws that secure the mount to the swinging door of the jeep.  I replaced the 2 set screws and retightened everything.   Now I am having trouble consistently making the local repeater and get signal reports of dropping the repeater.  What would be a where should I begin my trouble shooting?   

 22 
 on: Today at 04:46:14 AM 
Started by KA4KOE - Last post by W5DXP
Connect an 11.0' wire to the transceiver GND post and route it along the floor. The RF bite should be gone on 15 meters.

P.S. Don't let the cat near the bare end of that 11' wire. Smiley

 23 
 on: Today at 04:37:58 AM 
Started by W9DEC - Last post by W5DXP
For others who may be looking for Palomar Engineers manuals.

I don't see a PFS-1 manual available for download. I have a 3 page manual if anyone needs a copy. The PFS-1 works very well for comparing vertical antennas, e.g. mobile antennas.

 24 
 on: Today at 04:24:42 AM 
Started by GILGSN - Last post by KG4RUL
.......The operators are not employed by W1AW so they are not 'the ARRL'.....

Funny, I thought that W1AW was the ARRL headquarters station call sign.  I guess we better get the FCC to stop those pirates from using it.

 25 
 on: Today at 04:21:27 AM 
Started by MM0NDX - Last post by ON7RU
Chris, NU1O

Please check with our 9U4U QSL manager M0URX.
He's well know QSL'er and very keen on QSL'ing.

Hope it works out for you Chris, keep me in the loop if you don't receice an answer in a timely manner.


Frank, ON7RU

 26 
 on: Today at 04:19:29 AM 
Started by NW1HR - Last post by KG4RUL
Of course, laying the radials on top of the ground presupposes that you will NEVER dethatch the lawn.

 27 
 on: Today at 04:16:56 AM 
Started by W7ASA - Last post by MEKONGRF
Since you mention the Sierra Wilderness, can I post a cry for help that I recently posted on the Sierra Yahoo Group?  Perhaps someone who reads this might have some advice.

I bought a Sierrs Wilderness rig off Ebay about 5 years ago, (not because I intended to use it at that time, but because this rig had such a good reputation, was rare to find on Ebay, and I knew that I would use the rig at some time in the future).

The rig came with band modules for 3.5MHz, 7MHz, 10MHz, 14MHz, 18MHz and an unbuilt/partial band module kit for 21MHz.  A quick on-air test for each band produced signals, except for 14MHz, where the seller offered the suggestion that the band module crystal was faulty.  (I still need to replace it).

A transmit test into a power meter confirmed that the rig was putting out a few watts on each of the bands.

So all looked OK and the rig was stored in a box.

I have been living on the island of Phuket, Thailand since 2002, and finally got round to installing an antenna for the low bands.  I imported, (at great expense!), the DX Engineering Thunderbolt 80/40 vertical antenna, with 30mb add-on kit.  This antenna was installed with 64 radial wires in the middle of my plot.  A check with my antenna analyser showed low SWR (1.1 - 1.2) on the three bands of interest.

So I connected up my Wilderness rig and ... hmmm.  I could hear signals for all band modules, but the rig seemed, well... a little deaf.  This was especially so because I have an old Icom HF rig in my car, connected to a screwdriver antenna.  That installation was producing many signals on the same band and at the same time of my tests.

My initial thought was that there was a problem with my Thunderbolt antenna/coaxial lead etc.  So I connected the Wilderness rig to my screwdriver antenna  in my car to confirm my theory.

But the result was similar to that for my Thunderbolt antenna.  Some CW signals (and SSB on 40m), but nothing like what my Icom rig was receiving.

This problem of 'deafness' seemed to apply for all band modules.  I 'tweaked' the pre-mixer and receiver capacitors for maximum signal on each module, but they were generally already at their optimum.

So what could be the problem?

Let me say that all aspects/controls of this little rig seem to be working correctly.  It just seems deaf when doing comparisons with my short, screwdriver antenna and old Icom rig. (ie, I can hear a strong CW station on my HF rig, but the same station is weak or almost inaudible when I swap the Icom for the Sierra rig.

I have resoldered the centre connection of the antenna connector socket, in case the joint was dry, but that hasn't solved the problem.

I do have the manual and circuit diagrams for the rig, and would appreciate advice as to what measurements/tests I could perform to identify where the problem might lie.

Simon

I would start by checking the RF Gain control. It is labeled R1 on the schematics and connects to the band module connector at pin 7 and 8. When turned fully up there should be a short or a few ohms between pins 7 and 8, and around 1 kohm to ground from either pin.

Roy
Bueng Kan, Thailand

 28 
 on: Today at 04:01:53 AM 
Started by AK4YW - Last post by W4PC
1. Randy, K0CBH has never posted here.

2. I've ask N2MG to lock this thread twice.   

3. Jim, KB1NXE is an independent contractor with HRD

4. This is just a silly thread on eHam.  In 100 years, no one will care. Wink  I dont even care now about it...

 29 
 on: Today at 03:54:44 AM 
Started by AF3Y - Last post by AF3Y
Thanks for the kind words! Think I will have Kailua in the coffee to celebrate this morning, and maybe bacon AND ham.  (Kickstart the old ticker with a big jolt of cholesterol. hi)

Decided to see if I can recall my old Radio Traffic Analysis training and "set a trap" for the AP! He is QRV quite often, usually in my early morning.  He moves his darned TX freq around a bit from time to time, which does not make it easy. (Not to mention the howling EU banshees Shocked)

73, Gene AF3Y

 30 
 on: Today at 03:40:38 AM 
Started by AF3Y - Last post by NU4B
Another congrats!
You guys who have worked them are doing great. Its not like they have made a lot of Q's. Looking at Club Log, it says they only have a little over 5200 contacts in the log (and 3200 uniques). That's not many considering the demand out there for this one. Good job!

Pages: Prev 1 2 [3] 4 5 6 7 8 ... 10 Next
Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!