Re: Topband: RG-179 Coax

On 2/14/2020 1:04 PM, Jim Brown wrote: On 2/14/2020 11:40 AM, Fred Moeves wrote: Can you figure out impedance of coax with a device like the Rig Expert? Yes, if it's a model that can be calibrated, and if the calibration is properly done, and if it's a model that can export measurements

Re: Topband: RG-179 Coax

On 2/14/2020 12:59 PM, CUTTER DAVID wrote: However, in my experience cmc causes erroneous swr readings on antenna analysers I have used.  I would say it's almost useless to measure swr until cmc is eliminated. The proper location for the first common mode choke is at the feedpoint. When it

Re: Topband: RG-179 Coax

On 2/14/2020 11:40 AM, Fred Moeves wrote: Can you figure out impedance of coax with a device like the Rig Expert? Yes, if it's a model that can be calibrated, and if the calibration is properly done, and if it's a model that can export measurements to a computer. Calibration requires of

Re: Topband: RG-179 Coax

Jim, That's what I thought. Can you figure out impedance of coax with a device like the Rig Expert? Also I was only sending the info to somewhat confirm it's 75 ohm cable because it's not marked. I was not saying that it's a good or effective choke because the SWR was good. Thank You

Re: Topband: RG-179 Coax

On 2/14/2020 9:11 AM, Fred Moeves wrote: I put 75 resistor and 50 ohm dummy load  on each choke and scanned it with the Rig Expert 230 zoom and it seems fine. Common mode chokes do not affect SWR, and measuring SWR tells nothing about their effectiveness. See http://k9yc.com/2018Cookbook.pdf

Re: Topband: RG-179 Coax

Mike, I bought some from this Link . It seems ok to me. No markings on it and the guy could use a lesson on how

Re: Topband: RG-179 Coax

The Amphenol 21-579 I mentioned earlier is very flexible. KB4BR -Original Message- From: Topband [mailto:topband-bounces+ham306=bellsouth@contesting.com] On Behalf Of W0MU Mike Fatchett Sent: Friday, February 14, 2020 2:40 AM To: Andreas Junge Cc: 160 Subject: Re: Topband: RG-179

Re: Topband: RG-179 Coax

Hi Jim, I use Belden 9221 miniature 75-Ohm coax for my receive antenna chokes. It is very flexible making it easy to wind over the torroid core. I recently bought 100' of 9221 on ebay for a very reasonable price. It is readily available there and seems to do the job. Thomas - ac7a > On

Re: Topband: RG-179 Coax

On 2/13/2020 11:40 PM, W0MU Mike Fatchett wrote: I am making some receive antennas and the coax will be for the choke that goes through a torriod. As Mike understands, RG6 doesn't work. See pages 3 of http://k9yc.com/2018Cookbook.pdf 73, Jim K9YC _ Searchable Archives:

Re: Topband: RG-179 Coax

I am making some receive antennas and the coax will be for the choke that goes through a torriod.  The cores I have would not take rg6. This is from the YCCC receive antenna array. W0MU On 2/13/2020 5:55 PM, Andreas Junge wrote: Mike, What’s wrong with RG6? Or the DX Engineering version of

Re: Topband: RG-179 Coax

you ccan try CommScope F660BEF on eBay, les than 0.10/ft Was recommended here before 73, Jorge CX6VM/CW5W El jue., 13 feb. 2020 a las 21:55, Andreas Junge () escribió: > Mike, > > What’s wrong with RG6? Or the DX Engineering version of it: > > >

Re: Topband: RG-179 Coax

Mike, What’s wrong with RG6? Or the DX Engineering version of it: https://www.dxengineering.com/search/department/cable-and-connectors/product-line/dx-engineering-f6-75-ohm-bulk-coaxial-cable?autoview=SKU=rg6=BestKeywordMatch=Ascending

Re: Topband: RG-179 Coax

Mike, I bought some from ebay and also some connectors. I made several chokes and some RX switching parts. I'm out now and don't have access to my PC. The cable seemed fine. I'll put the info on here in tomorrow. Fred KB4QZH On 2/13/2020 6:31 PM, W0MU Mike Fatchett wrote: I am looking

Re: Topband: RG-179 Coax

This is actually an excellent price. The "usual suspects" like DigiKey and Pasternack get quite a bit more. The cheapest miniature coax is RG174 (polyethylene) and even that is not so cheap, at least at the vendors above. Rick N6RK On 2/13/2020 4:21 PM, Roy Morgan wrote: Or The RF connection

Re: Topband: RG-179 Coax

Or The RF connection .56/ foot $45.00 100 feet Reconnection.com (That is 75 ohm Teflon coax) Roy Morgan K1LKY Western Mass > On Feb 13, 2020, at 6:32 PM, W0MU Mike Fatchett wrote: > > I am looking for a good source for RG-179 coax to build some RX antennas. I > tried an Ebay seller and

Re: Topband: RG-179 Coax

Do web search for: The Wireman Roy Morgan K1LKY Western Mass > On Feb 13, 2020, at 6:32 PM, W0MU Mike Fatchett wrote: > > I am looking for a good source for RG-179 coax to build some RX antennas. I > tried an Ebay seller and got rg58!! > > W0MU > _ > Searchable

Topband: RG-179 Coax

I am looking for a good source for RG-179 coax to build some RX antennas.  I tried an Ebay seller and got rg58!! W0MU _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector