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References: [ +from:grants2@pacbell.net: 49 ]

Total 49 documents matching your query.

21. Re: [RFI] Choke questions (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Tue, 21 Jan 2020 13:42:48 -0800
It could happen, but I've not experienced it. It was a problem with TFE insulated wire wrap if the wire route was very tight to a post. The spec on posts was 0.002" maximum corner radius and I've nev
/archives//html/RFI/2020-01/msg00113.html (10,451 bytes)

22. Re: [RFI] Multi-Stage High Efficiency Air Conditioner Units (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Mon, 17 Feb 2020 19:20:23 -0800
I have a Carrier heat pump, but it is two speed, not variable speed. The HVAC engineer (who is the best I've ever met) said, "in our climate it's not worth the extra complexity & cost for the small E
/archives//html/RFI/2020-02/msg00078.html (12,284 bytes)

23. Re: [RFI] Arc-fault breakers (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sun, 23 Feb 2020 09:58:49 -0800
Having replaced more than a dozen of failed GFCI duplex outlets, I think they are junk. Installed outside, forget about it. Sometimes an electrician gets very creative to save $27, odd circuits conne
/archives//html/RFI/2020-02/msg00145.html (9,497 bytes)

24. Re: [RFI] UPS with external batteries (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Thu, 2 Apr 2020 10:54:12 -0700
Gary, I built a EMCOMM cabinet for our condo and it includes a HughesNet satellite link requiring 120vac. The inverter used was 24vdc sine wave inverter 600w samlex PST-600-24a (FCC class B). 600w ca
/archives//html/RFI/2020-04/msg00016.html (8,954 bytes)

25. Re: [RFI] looking for larger size ferrites (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Fri, 1 May 2020 13:55:07 -0700
Fair-Rite has a stock clamp on type 31 with an id about 18mm. https://www.newark.com/fair-rite/0431176451/ferrite-core-split-18mm-380-ohm/dp/03H8829?st=fair%20rite Grant KZ1W On 5/1/2020 11:56, David
/archives//html/RFI/2020-05/msg00006.html (7,761 bytes)

26. Re: [RFI] looking for larger size ferrites (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Mon, 4 May 2020 08:51:52 -0700
My CNC work has led me to RFI suppression ferrites for high power VFDs. The TDK PC40 material is recommended and the data sheet shows higher permeability and loss than #31. The available cores range
/archives//html/RFI/2020-05/msg00012.html (11,532 bytes)

27. Re: [RFI] RF proof router (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sun, 31 May 2020 10:14:20 -0700
My Netgear WNDR4300 seems unperturbed by QRO 160 > 6. 200ft underground to the cable modem and several runs around the shop. With the two router hops I am getting 60Mb/sec over 802.11 link to pc per
/archives//html/RFI/2020-05/msg00128.html (8,253 bytes)

28. Re: [RFI] Report on 12V 750W server supplies (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Fri, 5 Jun 2020 16:22:03 -0700
62.5a with power on/off control and 2.5a always on One youtube states the crowbar is set at 13.8v & did not recommend setting output above 13.6 I haven't seen any advice for adjusting crowbar setpoin
/archives//html/RFI/2020-06/msg00006.html (9,941 bytes)

29. Re: [RFI] Looking for explanation... (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Fri, 26 Jun 2020 12:34:42 -0700
Any surge protectors on the problem circuit? Degraded MOV's can cause problems. GFI outlets also. Grant KZ1W On 6/26/2020 10:30, Gary Peterson wrote: Periodically, I have been plagued with RFI from a
/archives//html/RFI/2020-06/msg00033.html (9,271 bytes)

30. Re: [RFI] Rheem AC RFI (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sun, 6 Sep 2020 08:55:04 -0700
One good example of RFI engineering: I replaced my rotary 3 phase converter (American Power 20HP) with a solid state Phase Perfect. The PP has 20HP/64a continuous output and a 10sec surge rating of ~
/archives//html/RFI/2020-09/msg00030.html (14,836 bytes)

31. Re: [RFI] Noisy PC Speakers (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sat, 19 Sep 2020 07:11:57 -0700
Plus they might use a class D amplifier which can be a great noise source. Grant KZ1W Several years ago, W6GJB told me about his experience with a pair that powered off of USB. The DC-DC converter wa
/archives//html/RFI/2020-09/msg00053.html (8,710 bytes)

32. Re: [RFI] Inverters? (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sun, 20 Sep 2020 08:04:07 -0700
This is a great testing topic for ARRL Labs. Honda vs Yamaha vs Harbor Freight inverter gens. 1, 2, & 3kw. versions. From some anecdotal data and a deep dive into the HF 3kw electronics the results m
/archives//html/RFI/2020-09/msg00060.html (8,779 bytes)

33. Re: [RFI] Inverters? (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Mon, 21 Sep 2020 10:24:26 -0700
Adding my 2c. The makers of inexpensive generators obviously want to advertise the maximum power capacity. That means 100% loading of the motor hp, 3600rpm operation, maximum power output of the alte
/archives//html/RFI/2020-09/msg00077.html (17,735 bytes)

34. Re: [RFI] Inverters? (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Mon, 21 Sep 2020 10:40:11 -0700
Here is another interesting super portable, this one an inverter: https://www.ryobitools.com/products/details/900-watt-propane-inverter-generator It was on sale cheap ($140? IIRC) at Home Depot, but
/archives//html/RFI/2020-09/msg00078.html (11,859 bytes)

35. Re: [RFI] RFI on Shore Line of an RV (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Mon, 28 Sep 2020 17:12:01 -0700
I wouldn't use snap on beads, as there is little choking R. Check out the Field Day generator choke that K9YC describes on his web site. Choking all three wires is a must. If there still is RFI then
/archives//html/RFI/2020-09/msg00188.html (8,535 bytes)

36. Re: [RFI] RFI on Shore Line of an RV (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Tue, 29 Sep 2020 12:24:38 -0700
or $15 on ebay. Note that NEC does not permit filtering of the green wire so CM noise enters via it. The only green connection on filters made in the last several dozen years is directly to the case,
/archives//html/RFI/2020-09/msg00204.html (12,159 bytes)

37. Re: [RFI] Clean Audio Amplifiers For Amateur Use? (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Tue, 13 Oct 2020 10:07:07 -0700
I think most stereo/5/7/9 channel "receivers" are transformer power supplies and AB designs. At least the couple dozen I've owned. Maybe the latest $100 ones at Best Buy are now SMPS. If the power la
/archives//html/RFI/2020-10/msg00060.html (10,404 bytes)

38. Re: [RFI] Sine wave correction for small generators (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sat, 31 Oct 2020 21:01:27 -0700
Is your gen an inverter type? At 7.5kw a bit unusual for a residence. Then the inverter types use a multi KHz inverter frequency and produce a reasonable sine wave (some near perfect). OTOH, cheap DC
/archives//html/RFI/2020-11/msg00000.html (9,147 bytes)

39. Re: [RFI] An article that happened to pop up today (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Wed, 16 Dec 2020 21:08:20 -0800
Some of the ferrite "small chokes" (inductors) work well since the DC resistance is low and the SRF is high. Others not so good with high R and SRF well below 1MHz, so might work for some RFI but not
/archives//html/RFI/2020-12/msg00057.html (9,954 bytes)

40. Re: [RFI] ESD "Pad"? (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Wed, 6 Jan 2021 05:49:31 -0800
Standard OCB assembly and parts handling anti-static mats https://www.uline.com/BL_7403/Anti-Static-Table-Mats Grant KZ1W 73 QWH QWM, Dan K2YWE (K3AU) In the 1980's, my wife was working on computers,
/archives//html/RFI/2021-01/msg00007.html (9,288 bytes)

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