Search String: Display: Description: Sort:

Results:

References: [ +from:flood@ixi.net: 45 ]

Total 45 documents matching your query.

1. Topband: preamp construction (score: 1)
Author: flood@ixi.net (Steve Flood)
Date: Fri, 20 Dec 2002 16:14:10 -0700
While in the process of putting a preamp together (KD9SV design, 160 and = 80 versions in the same box), I realized that I have to run the RF = inputs and outputs very close together to utilize relay
/archives//html/Topband/2002-12/msg00253.html (6,882 bytes)

2. Topband: preamp construction (score: 1)
Author: flood@ixi.net (Steve Flood)
Date: Sat, 21 Dec 2002 06:58:30 -0700
Thanks Tom - this amp design has a variable gain, the "zero-gain" point of which is set by the correct selection of the biasing resistors. If I train myself to only switch bands when the pot is turne
/archives//html/Topband/2002-12/msg00257.html (8,466 bytes)

3. Topband: 3sk88 for KD9SV preamp (score: 1)
Author: flood@ixi.net (Steve Flood)
Date: Sun, 24 Nov 2002 12:00:32 -0700
I have everything together to build the KD9SV preamp, yet cannot locate = the 3SK88 MOSFET. Does anyone know who sells these??? Steve, KK7UV -- StripMime Report -- processed MIME parts -- multipart/a
/archives//html/Topband/2002-11/msg00149.html (6,354 bytes)

4. Topband: 1830 beacon (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Mon, 6 Oct 2003 06:17:26 -0600
Hearing something like D0C beacon on 1830 this morning around 1200z. Surely someone else has heard it? Steve KK7UV _______________________________________________ Topband mailing list Topband@contest
/archives//html/Topband/2003-10/msg00036.html (6,097 bytes)

5. Topband: impedance transformer windings (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Mon, 27 Oct 2003 14:04:27 -0700
I've been trying to put together an impedance transformer on the Amidon BM-73-202 binocular core. It is to be used on a flag RX antenna for 160m so I need about a 950:50 (19:1) transformation. The pu
/archives//html/Topband/2003-10/msg00154.html (6,852 bytes)

6. Topband: impedance transformer windings (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Mon, 27 Oct 2003 18:44:48 -0700
Thanks everyone for the help... Once I thought about it some, it finally clicked in.......Inductance (uH) = 8.5 (turns^2) for the BN-73-202 core. All I have for now is the BN-73-202 cores. I worked u
/archives//html/Topband/2003-10/msg00157.html (6,870 bytes)

7. Topband: impedance transformer windings (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Tue, 28 Oct 2003 17:06:00 -0700
After some quiet time with paper, pen, and calculator - I think I got it figured. I'm trying to go from 950 to 50 ohms, or 19:1, or 4.36:1 turns ratio for a single BN-73-202 core. A 2 turn:9 turn win
/archives//html/Topband/2003-10/msg00162.html (9,061 bytes)

8. Re: Topband: impedance transformer windings (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Thu, 30 Oct 2003 19:21:40 -0700
I could not get the math to work out without changing the formula. Take the popular 3-core transformer (BN-73-202) with 2 turns:4 turns. This is supposedly a 16:1 transformer. In order to do that, th
/archives//html/Topband/2003-11/msg00003.html (7,281 bytes)

9. Topband: MFJ1025 transformer (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 1 Nov 2003 08:55:58 -0700
W8JI mentions a 1:4 step-up transformer on the 1025 for 5 dB improvement. Is this an isolation-type winding on a toroid, or something more like a Ruthroff 12.5-ohm:50-ohm "un-un" winding? Does anyone
/archives//html/Topband/2003-11/msg00010.html (6,746 bytes)

10. Topband: measuring transformer core inductance (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Thu, 13 Nov 2003 18:36:54 -0700
I picked up an LCR meter for the main purpose of winding transformers and being able to nail down the actual inductance and transformation ratios. The meter was advertised as "Frequency to 15MHz" but
/archives//html/Topband/2003-11/msg00103.html (7,546 bytes)

11. Topband: AM BC interference (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Mon, 8 Mar 2004 03:52:08 -0700
Very loud hispanic station on 1.820 this morning (1047 GMT) heard here in MT coming in loudest over South and East antennas, so spilt the difference and say southeast. _______________________________
/archives//html/Topband/2004-03/msg00079.html (6,681 bytes)

12. Topband: Re: K9AY Antenna Question (score: 1)
Author: "steve flood" <flood@ixi.net>
Date: Sun, 29 Aug 2004 19:54:43 -0600
place of the fixed termination >resistors. Looking at some older posts, it appears that the way to use them is with a 1k pot connected to >the 12v supply. Is this how folks do this? There's really n
/archives//html/Topband/2004-08/msg00121.html (8,415 bytes)

13. Topband: matching elevated vertical (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Fri, 10 Dec 2004 07:43:46 -0700
I am setting up a balloon vertical (136 ft. radiator) with a feedpoint at 30 feet above ground and 4 radials about 60-foot long each. I'd like to do something at the feedpoint to transform the 56-j11
/archives//html/Topband/2004-12/msg00157.html (7,174 bytes)

14. Re: Topband: matching elevated vertical (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Fri, 10 Dec 2004 12:44:34 -0700
From: "Bob Tellefsen" <n6wg@comcast.net> You didn't say what power level you want to run. Assuming it isn't too much, you could wind a simple matching toroid transformer. You need a turns ratio of "s
/archives//html/Topband/2004-12/msg00162.html (7,648 bytes)

15. Re: Topband: matching elevated vertical (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Fri, 10 Dec 2004 14:44:15 -0700
Thanks for the tips everyone. I decided to fly the balloon and measure the impedance. 52 - j92. Not too far off from the modelled value. I went ahead and added some more wire to the ends of my radia
/archives//html/Topband/2004-12/msg00163.html (8,405 bytes)

16. Topband: EU frustration (score: 1)
Author: flood@ixi.net
Date: Fri, 7 Jan 2005 14:36:30 -0700 (MST)
I turned a couple of insomnia-ridden nights into some careful listening on topband. I got to hear loads of stateside folks (including my neighbors in WA, ID, MT, OR) dropping calls on DX stations I c
/archives//html/Topband/2005-01/msg00103.html (7,194 bytes)

17. Re: Topband: DX last night and QRM problem (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 5 Feb 2005 08:09:17 -0700
-- Original Message -- From: "N1BUG" <paul@n1bug.net> It sounds like something oscillating, but it is a rough, growling, very unstable note that is often 3 or 4 kHz wide. It also moves up and down th
/archives//html/Topband/2005-02/msg00079.html (7,652 bytes)

18. Re: Topband: High and low angles (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 5 Mar 2005 06:32:10 -0700
Bill Tippett wrote... TOA I have asked about this topic a couple times before....But for those of us whose horizon is blocked by surrounding mountains up to 15 to 20 degrees elevation angle, is it ev
/archives//html/Topband/2005-03/msg00051.html (7,147 bytes)

19. Re: Topband: Unknown Stations (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sat, 5 Mar 2005 15:34:33 -0700
Likely ID beacons Bill - I hear them occasionally as well - I believe they are typcially ocean bouys, fishnet markers and the like. I heard one last week that was sending "AIAIE".... Steve KK7UV ___
/archives//html/Topband/2005-03/msg00064.html (6,962 bytes)

20. Re: Topband: FT5X (score: 1)
Author: "Steve Flood" <flood@ixi.net>
Date: Sun, 27 Mar 2005 06:21:22 -0700
Gary - the N3GK.com site says until April 1. No copy here in MT either - only a few minutes of mutual grayline with them. Steve, kk7uv _______________________________________________ Topband mailing
/archives//html/Topband/2005-03/msg00227.html (6,436 bytes)

Current List: 1 - 20
Page: [1] [2] [3]
This search system is powered by Namazu