AmateurRadio.com

Breath new life into a Heathkit HP-23 power supply

No direct replacement capacitors

Old Heathkit Parts to the rescue

HP-23D PCB

The 3w 100k resistors go on the bottom mounted 1/4" off the board so they don't burn the board (they get hot)

Partially populated board

All done, ready to wire up to the HP-23 transformer and choke

Gotta get the power from the supply to the radio

Power cable

Amp-key line out

The smell of hot tubes awaits...  or magic smoke...  I hope it's the former

Richard Carpenter, AA4OO, is a regular contributor to AmateurRadio.com and writes from North Carolina, USA. Contact him at [email protected].

It seems like the FCC's recent interest in doing an in depth study of the growing RF spectrum noise floor has taken a new twist.



The FCC's apparent lack of real action in gathering the data needed to make serious inroads into RF noise pollution has drawn the attention of the ARRL, which voiced their concerns in a recent ARRL Letter as well as in their formal response to the FCC.

In response to the FCC's Public Notice (ET Docket No. 17-340) Spectrum Management proposals.

The ARRL "took the opportunity to strongly urge the FCC to reinstate a 2016 TAC noise floor study, which, ARRL asserted, apparently was terminated before it even got started." It would seem that the proposed in-depth study never even happened and the term 'noise' has morphed into an 'interference' issue!

The FCC's paper proposed a number of guiding 'principles' in going forward with spectrum management policies, loosely based on the concept that more emphasis on eliminating 'interference' should be placed on receivers along with continued development of transmitter spectral purity and that with increased spectrum crowding, users will simply have to expect and accept certain, as yet unspecified, levels of interference!

It sounds suspiciously as if the FCC has decided that the source of any noise / interference problems have become too large to control and have passed the buck to equipment manufacturers in order to solve the growing problem for users!

“Indeed, it is difficult to imagine how the Commission can now…suggest the adoption of specific spectrum management principles, incorporating such concepts as receiver immunity, HCTs [harm claim thresholds], and interference temperature determinations without having…a firm grasp on ambient noise levels in basic RF environments and geographical areas,” the League told the FCC.

In their series of guiding principles relating to 'interference realities', the FCC has issued a number of broad, somewhat ambiguous statements, that might be interpreted in any number of odd ways ...

"Principle #1 -- Harmful interference is affected by the characteristics of both a transmitting service and a nearby receiving service in frequency, space or time;

Principle #2 – All [radio] services should plan for non-harmful interference from signals that are nearby in frequency, space or time, both now and for any changes that occur in the future;

Principle #3 – Even under ideal conditions, the electromagnetic environment is unpredictable. Operators should expect and plan for occasional service degradation or interruption. The Commission should not base its rules on exceptional events;

Principle #4 – Receivers are responsible for mitigating interference outside their assigned channels;

Principle #5 – Systems are expected to use techniques at all layers of the stack to mitigate degradation from interference;

Principle #6 – Transmitters are responsible for minimizing the amount of their transmitted energy that appears outside their assigned frequencies and licensed areas;

Principle #7 – Services under FCC jurisdiction are expected to disclose the relevant standards, guidelines and operating characteristics of their systems to the Commission if they expect protection from harmful interference;"

The ARRL response argued that:

“Requiring better performance from receivers or RF-susceptible devices is a valid, reasonable, and long overdue requirement,” ARRL said, “but the major goal of doing so should be to prevent instances of interference ..."

Specifically they argue that amateurs are unique users and able to recognize harmful interference beyond their control and should not be subjected to the same restrictions (ie. get ready to accept new levels of yet undefined interference levels) as commercial users.

"ARRL argued, however, that the Amateur Service should not be subject to receiver immunity standards, because licensees employ a wide range of propagation, emissions, bandwidths, power levels, receivers, and antennas, making any receiver performance standards arbitrary and compromising the Service’s experimental nature. They also are able to differentiate between interference from nearby spurious or out-of-band signals and that caused by receiver deficiencies. The HCT concept does not fit the Amateur Service particularly well, either, the League said; any interference hams suffer from each other is resolved cooperatively. Brute-force overload also occurs occasionally but is resolved by licensees without FCC intervention."

The ARRL seems somewhat forgetful when it comes to several long-standing complaints of inappropriate amateur-generated interference and bad behaviours which have been ignored for far too long ... problems well beyond 'cooperative resolution' by affected amateurs.

Although the ARRL does agree with many of the FCC's proposals, they doggedly insist that the FCC's apparent quashing of their original noise data investigations is critical to going forward:

“That, in ARRL’s view, is a big mistake,” the League contended. “No system of spectrum management incorporating [harm claim thresholds] and receiver immunity levels can be accurately implemented” without the noise study data.

“That study is more important now than ever before,” ARRL concluded, “and it is increasingly urgent as a prerequisite for any new spectrum management policies.”

With Washington's drastic cutbacks in FCC field-office investigators and overall budget trimming, it seems that the FCC is still relentlessly driven to eradicate all forms of illegal (pirate) broadcasting. It's a pity that they don't display the same zeal for dealing with the illegal imports and distribution of the offshore equipment that is quickly killing our ability to hear anything on the ham bands ... without selling-off and moving to several acres in the country.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

In this latest installment of Linux in the Ham Shack, the hosts discuss a new D-Star satellite being launched, wee ones deleting bookmarks, the ARRL and symbol rate limits, an Open Source anniversary, Ansible, a new LimeSDR and much more. Thank you for listening. We hope you enjoy!

73 de The LHS Crew

Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

The world is divided into two groups: Bag Guys and Not Bag Guys. (I am using “guy” as gender neutral.) I am a Bag Guy. I am always looking for just the right backpack, computer bag, luggage or duffel bag. For example, I’ve got this special bag, a backpack, that I use for hauling my portable VHF/UHF radio gear. You might call it a Go Bag but it really only has radio gear in it.

My gear for Summits On The Air (SOTA) has expanded a bit, so obviously it was time for a new bag. I decided to buy this backpack because it has solid construction and plenty of pockets. I don’t plan to actually use this as a backpack, it will be more of a “toss the gear into the back of the Jeep” bag…but having backpack straps on it will come in handy. This bag will carry spare cables, chargers, batteries, etc. that I want to keep with the radios but won’t take on the trail.

 

I chose the “Coyote” color for two reasons: 1) my kids keep making fun of me for always buying black bags and 2) it doesn’t show the dirt as much.  This bag came with a US flag attached to it, which was a nice bonus. I kind of like patches but I don’t actually attach them to my gear or clothing very often. My interest in any particular patch changes with time and location. And I don’t want to put on so many of them that I look like a Boy Scout with a sash full of merit badges.

Well, the military has solved this problem through the use of hook-and-loop attachments (“Velcro”) on tactical gear. Feel like a little flair? Slap on a patch. Get tired of it, just take it off. Brilliant. For a little background on proper flair, see this video clip from the movie Office Space.

I thought the US Flag was pretty cool, so I found a Colorado flag to add to the collection. Then I got to thinking about using patches to label the bag. I noticed the many vendors that make custom text patches (often referred to as “Name Tapes”). These work great for labeling bags, pouches, etc. I ordered mine from a third-party on Amazon: 3 Inches/Hook Fastener/ Personalized Custom Name Tape

Of course, another option is to put my name on the patch. By name, I really mean name and call sign. If there are a pile of radio bags, everyone will know which one is mine. This is where it can get tricky because my call sign has a zero in it and not all vendors know how to handle the slash-zero thing. I decided to give it a try by just inserted a slash-zero character into the entry field on the web page. As you can see in the photo, it worked out just fine.

 

Do a little websearching and you’ll find plenty of military/tactical gear that has hook-and-loop fasteners built into the design. But, you may already have your favorite backpack that doesn’t have this feature. No problem, go ahead and attach a strip or two of the fuzzy (loop) material to it and you can slap your favorite patch on it.

I can already see how this may will get out of hand. There are so many packs, pouches, bags, hats, jackets that could use some proper labeling, or maybe just a little flair.

73, Bob K0NR

The post Flair For Your Radio Bag appeared first on The KØNR Radio Site.

Bob Witte, KØNR, is a regular contributor to AmateurRadio.com and writes from Colorado, USA. Contact him at [email protected].

Here is this week’s space weather and geophysical report, issued 2018 Feb 05 0144 UTC.

Highlights of Solar and Geomagnetic Activity 29 January – 04 February 2018

Solar activity was at very low levels from 29 Jan – 03 Feb. Low levels were observed on 04 Feb as new Region 2699 (S04, L=171, class/area Hsx/080 on 04 Feb) produced a C1 flare at 04/2024 UTC. The region also produced numerous B-class flares after rotating onto the disk. No Earth-directed CME activity was observed during the period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at moderate levels on 29 Jan with a peak flux of 130 pfu observed at 29/0005 UTC. Normal levels were observed from 30 Jan – 04 Feb.

Geomagnetic field activity was at mostly quiet levels with isolated unsettled intervals observed early on 30 Jan and again late on 31 Jan.

Forecast of Solar and Geomagnetic Activity 05 February – 03 March 2018

Solar activity is expected to be to be at mostly very low levels with a slight chance for low activity through 16 Feb due to the emergence of Region 2699. Very low levels are anticipated from 17-28 Feb after the departure of Region 2699. A slight chance for low levels is possible from 01-03 Mar due to the return of old Region 2699.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal levels from 05-14 Feb and again from 26 Feb-03 Mar. Moderate levels are likely from 15-25 Feb due to influence from recurrent CH HSSs.

Geomagnetic field activity is expected to be at quiet to unsettled levels on 05 Feb, 15-17 Feb and 20-22 Feb, with isolated active periods likley on 16 Feb. This activity is due to influence from recurrent CH HSSs. Mostly quiet conditions are expected for the remainder of the outlook period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

Check out the stunning view of our Sun in action, as seen during the last five years with the Solar Dynamics Observatory (SDO): https://www.youtube.com/watch?v=zXN-MdoGM9g

= = = = =

BOOK SALE: Space Weather and Sun Science – get these from Amazon, and help us stay online!

NOTICE: When you buy this (or any item after starting with this link), you are helping us keep our SunSpotWatch.com and other resources “on the air” (up and running!). In other words, you are helping the entire community. So, check out this book:

Here is the link to Amazon: http://g.nw7us.us/fbssw-aSWSC

We’re on Facebook: http://NW7US.us/swhfr

Visit, subscribe: NW7US Radio Communications and Propagation YouTube Channel

In this episode,  Martin M1MRB is joined by, Leslie Butterfield G0CIB, Matthew Nassau M0NJX, and Bill Barnes N3JIX  to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief, and this episode’s feature is RF Safety by Bill Barnes (N3JIX).

We would like to thank our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate

• SSTV on a Baofeng?
• New BT broadband service to transmit across VHF
• Updates Iceland Radio Regulation
• AO-92 Commissioned and Open for Amateur Use
• New Zealand get 5 MHz (60m)
• Signal From 'Dead' NASA Satellite
• InnovAntennas Releases 4/2m Dualbander
• 20m WSPR Balloon Travels the World
• WIA Want Power Increase

Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Time to start planning for retirement, if you say it fast the end of 2019 is not that far off and that is my official retirement date! As the old saying goes and it's so true "Where did the time go?". I will be 59 at the time of retirement and with good health I should be enjoying this next phase of my journey for some time. So where does ham radio fit into my plans? I could say that once retired I will have all the time in the world for radio......BUT........I have been off for extended holiday periods and at that time I thought I had all the time in the world. It seems even when not working you can still become very busy and radio gets crowed out with other "things" So one of my goals is to make sure I put time aside for radio time.
One of our big retirement plans (as Julie retires the same time I do) is that we are picking up and moving to the UK! We both are citizens of that great country and will be spending our retirement years there and also traveling abroad from our UK home homebase. This brings me back to ham radio again, at this point in Canada I hold an advanced ticket which includes 12 wpm CW. I have been all over the Ofcom (Office Of Comunications) site in the UK looking for information on how my transition regarding my amateur radio licence will be dealt with by Ofcom. Those of you over in the UK reading my blog maybe you can add some insight for me in regards to when I move will my Canadian licence transfer to a UK licence, do I have to start over or a combination of both? I did try my best in going over the Ofcom website but to be honest it is a confusing site.


Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].