Sunday, January 22, 2017

To nap, or Not to nap. There in the studio..

If you happen to have a mind to spare, here's a unique and fascinating form of promotion you could use on your part 15 station. I'd bet you'd have people tuning in who never considered bothering to before.
It's legal, could be life changing, but I'm not seriously suggesting it...

It's from a fascinating post over at Arcane Radio Trivia;

It's about DJ Peter Tripp host of "Your Hits of the Week" who in Jan. 1959 hosted an on air in the studio 'Wake-A-Thon' for the American March of Dimes. He stayed constantly awake and on air for 201 hours straight. He stayed on the air, but behind the scenes things were getting ugly, and he experienced permanent personality changes.

Read the whole story here:

Me, I'm more inclined to go to sleep.

Part 15 "Roof Hopper"

Here's an interesting article on building. your own part 15 "Roof Hopper",  from Popular Electronics, Dec. 1961,  beginning on page 47. This is not the type of Part 15 transmitting I'm usually interested in, as my primary interest is broadcasting in the upper AM bands of public radio, but the first page of the article definitely is worth a read..


Click any image to enlarge, or to read the whole issue see link at bottom of this page.. 

Saturday, January 21, 2017

Thursday, January 12, 2017

Pretty Fly For a Wifi - Advertise Part 15 for free.

I recall someone had advertised their part 15 station by changing the SSID name of their WiFi router, can't find it now, but it said something like:

Tune to CityRadio1650AM!

That way anyone in the area would see it show up it in their list of connections of their laptop, tablet, phone, or even a nearby home computer - Curiosity would kick in and they will reach for their radio dial to see what it is.

Not a bad idea, I have seen some pretty strange and funny SSID names pop up on my tablet before which made caught my attention.

It a simple and quick process to change the name of your SSID. You just log into your router from any connected browser, and simply replace the name Netgear (or whatever) to the name you want it to be.
The address to log in varies between routers, so check your manual or google the information for your router model.

'I now pronounce you man and WiFi'

It doesn't matter if you have a secured or open WiFi network for this to be effective  for your station, just enter your station name and frequency, and it will automatically display to the devices within range.

Here's some creative SSID Names I found displayed on the internet (not part15 related):

So get creative with the SSID to promote your Part 15 Station!

Something more to look into:

Getting fancy: If you'd like to get fancy with how your WiFi is displayed (and I've not tried this, but others sources say it works) you can enter your text in this unicode text converter page, and then select from about two dozen options copy and paste the generated text as your SSID name, and that's how it will be displayed on most devices:
ᴛᴜɴᴇ ʀᴀᴅɪᴏ 1660ᴀᴍ
𝙏𝙪𝙣𝙚 𝙍𝙖𝙙𝙞𝙤 1660𝘼𝙈
𝕋𝕦𝕟𝕖 ℝ𝕒𝕕𝕚𝕠 𝟙𝟞𝟞𝟘𝔸𝕄

The caveat to using Unicode text is that each letter is about 4 bytes, whereas if using regular text only 1 byte per letter. Your allowed no more than 32bytes for your SSID name

Tune Radio 1660AM (regular text)
15 letters + 2 spaces = 17 x 1 = 17 bytes used (plenty of bytes to spare)

11 Unicode, 4 letters + 2 spaces = 52 bytes used (over limit)

If your going to use Unicode then your going to have to keep it short:
6 Unicode, 4 letters + 0 spaces = 30 bytes used (within limit)

Tuesday, January 10, 2017

Saranade a creepy Part 15 doll

"This year's news in toys is mainly noise.. The dolls of of 1962 tend to be loquacious: Blabby (about $10); Chatty Baby, Crying Thumbelina, Belle Telle, Saranade, and Little Miss Echo ($15 up). Long past mere infant habits like sobbing, blowing bubbles and waggling arms and legs, they answer phones, sing, converse one-sidedly, even repeat the admonitions addressed to them.." --Life magazine Nov. 16, 1962 page 29

What's with the dolls you ask? Well todays subject concerns a particular doll which Life magazine had so briefly mentioned.. her name was/is Saranade.

WARNING: This post won't be useful to you.

Saranade came to my attention via Tim in Bovery of KEBS 1620AM (part 15) located in "Iron Range Country". Tim introduces us to Saranade in this excerpt of his post at titled:
Part 15 Record Player Transmitter with Creepy Doll!
"Every now and then I stumble upon something I can't resist.  Such is the case with the "Saranade" Doll.  Made by Westinghouse in 1962. Saranade is the name of the doll, a typical 21" plastic girls toy doll.  With a receiver in her tummy! She comes with her own record player and record.  A real, kids 4 speed electric record player.  It plays records through a speaker or you can turn the knob to "doll" and it shuts off the speaker and sends the audio to an AM transmitter within the record player and transmits the record being played to the radio in the doll! 
This appealed to all my interests: record players, low power transmitters, oddball records, and creepy dolls.."
- Tim in Bovey, KEBS 1620AM

Saranade in the KEBS studio

I couldn't agree more, the idea of a doll that talks to you via Part 15 was delightful to me - not that I have any affectation for dolls, mind you, but unique uses of part 15 always catches my attention. Sure, there's been countless toys thru the years which had, and do utilize miniature transmitters, but, a little girls doll from a half a century ago?
What most intrigued me is that this part15 doll by chance fell into the hands of a part15 broadcaster, who put her on the air of his part15 station, and then told the part15 community, so now we all know about Saranade.
If you've come this far, you might as well listen to this part15 doll sing:

Besides the above audio clip, Tim took about a half dozen detail photos, with descriptions in this pdf  of his "creepy doll", its companion record player, and of Saranadee as she worked her shift at KEBS studio.
I don't actually think she's creepy, if she was it would be even better, but I think he's talking about her voice, which almost seems to have a sinister vibe behind the sweet voice.. She could play a good part in a horror movie.

"..I assumed it would transmit in the AM broadcast band, but it appears not to. The receiver in the doll seems to work fine, no repairs needed there, except she takes a round 9V battery that they don't make any more. She runs on a typical square 9V but the battery doesn't fit in the battery holder molded into her stomach. The radio in the doll has no controls except an on/off switch. No tuner, no volume.."  - Tim in Bovey

The  Radio  Museum provides schematics for this doll and states  it uses a 180 kHz transmitter in phonograph, and a 3 transistor USA made radio chassis tuned to around 185 kHz in the doll.

The model ED-1 is blonde and the ED-2 in brunette... Why no ED-3 redhead?

"..The record player needs work. Motor bearing, spindle bearing, cartridge is weak. But the transmitter seems to work fine. Checking it out on my spectrum analyzer it transmits from about 158 KHz to 220 KHz. Theres a tuning adjustment knob that moves a slug up and down inside a small coil.  Best signal is at about 171 KHz. It's pretty rich in harmonics, too.  I'm not familiar with the Part 15 rules from 1962, or even if this qualified, LOL.   Uses a 25C5 tube.  The short antenna inside the case actually connects to one of the hinges for the lid!.."  - Tim in Bovey
Based on John Reeds information in the preceding blog post,, I suppose in 1962 it would have been operating under 15.202.

"..The receiving antennas for the radio in the doll are wires in her legs!.."  - Tim in Bovey
That's  hilarious. She might  get better reception if you  stand her on her head.

Popular Mechanics featured Serenade in their November 1962 issue with a full page intro "drop test" to determine Serenade's durability.. She passed with flying colors..
"When you drop a doll containing a remote control radio speaker from table top height (and how many times has your youngster knocked something off the table?) you might wonder whether she could survive. Westinghouse's Saranade Doll not only survived the ordeal--she kept on singing! So did the record player which supplies her "voice"--when it was drop tested.. ..Saranade Doll ($40) comes with phono which broadcast remotely through doll speaker. 
--Pages 96, 101
Though it was nationally advertised and featured in many publications, it's unclear how popular Saranade actually was in her day, but there is one collector, Yvonne Barr of Vintage Pretties on Ruby Lane, who had received one when she was young; "..a few years ago; in fact five to be exact I was a new seller to RubyLane and was spending time looking at the items offered for sale. Suddenly a doll appeared on my screen and I was flooded with childhood memories..". She goes on to tell how all she wanted for here 13th birthday was a record player, and that she was angry and embarrassed when she received a Saranade. She gave the doll to her sisters and kept the record player. You can read her full account here:

Cincinnati Enquirer Dec. 15 1963
It appears Westinghouse had done some heavy promotion of Saranade for about year, then it just seemed to disappear, and evidently no more were produced. They were pretty expensive at $40 when they first came out in 1962,but by 1963 the price dropped 50%. The 1963 ad at left says: "We have 50,000 dolls on hand, and the only way we can sell them this season is to sell them directly to you . . "
Seem surprising that Saranade even appeared in Billboard magazine:

"I have the original Saranade record AND the instructions, warranty card, etc all the paperwork. It says it will transmit up to 12 feet. If reception gets weak supposedly it will help if you hold the doll by her legs! LOL.
[I need to] get the motor repaired. I'll have to salvage a motor bearing from my record player graveyard in the basement."
- Tim in Bovey
Based on several antique sites and forums, Saranade appears to be in a strong demand these days, with some asking as much as $600 (insane ain't it?). Currently there's one on ebay asking $299, but another in lesser condition just sold having three bidders for about $130 a few weeks ago.

Get yours today!
Saranade's not quite enough transmitter for a part 15 station, but at least you'd be sure it's within regulations.

Life-like "Saranade" doll and phonograph. Lifelike Saranade sings songs, tells stories, teaches how to dance, count and practice good habits as you carry her around indoors or out. Just play any record and, without wires, Saranade's magic voice box will pronounce every word just as it's recorded. Operates on one 9-volt battery (not included). Complete with Westinghouse 4-speed phonograph which can be used with or without doll, and I Saranade record
The Cincinnati Enquirer, Wednesday, December 12, 1963 - Page 10 

Newsweek, Volume 59, 1962


Saturday, January 7, 2017

Origins of Part 15 / Closer look at 15.219

`When it comes to Part 15 broadcasting, there are several methods and options.
The more elaborate broadcaster may follow applicable rules such as 15.221 for Carrier Current installations, which utilize a buildings existing wire system and/or power lines, but most opt for the simpler stand alone installation with a single whip or wire antenna.

  • Following Rule 15.229 for FM is excellent if your objective is to cover your house and yard.
  • Equally sufficient for covering your home area is 15.209 for AM.
  • But if your objective is to reach your whole neighborhood and possibly beyond, then following rule 15.219 for AM is the only capable option (other than CC).

But where did these particular rules of Part 15 originate?
It's a rather important question because had not these particular subsets been provided by the FCC, we would not be able to legally broadcast without a license over the public airwaves at all without a license.
A long time ago I had asked the question: "Why, and when did 15.219 originate?" over in the Radio Discussions "LPFM and Community" forum, which is the remnant, or rather, a attempted revival of its previous incarnation "Community Radio USA", which was in it's day the most predominate and active Part 15 resource on the web.
My question was specifically in regard to a 2005 NOUO in which a AM1000 Rangemaster transmitter had been cited with 15.209, yet 15.219 had not even been mentioned. This cause me to speculate if perhaps 15.219 had not yet been in existence in at the time of the citation in 2005.. But it had been in existence.. So then why hadn't the NOUO considered the alternative .219 rule?
The question was eventually answered by member named Neil who explained:
"From my quick reading on this topic 15.219 certification of the Rangemaster only applies if the unit is installed 100% to the specs of the certification. You must install it correctly. Many people feel that buying a Rangemaster automatically gives them a part 15 certified transmitter. If the unit is not installed correctly to specs, then it is not considered certified and falls under 15.209 Subject to get an NAL" - Neil, in Post #10

It's an accurate answer, however, it doesn't account for the fact that in most cases NOUO's for AM always cite both rules and detail how neither compliance had been met. It appears to actually be a requirement that FCC inspecting agents consider both rules (based on the feud agents manual). But on rare occasion 15.219 does not get addressed for whatever reason, such occurrences are perhaps just due to the inspecting agent forgetting to include it in his report.
John Reed of the FCC seems to have addressed this in the following quoted comment:

"A transmitter is certified under Section 15.209 or 15.219. If it was certified under Section 15.209, the radiated emissions must comply with the limits in that section. If it was certified under Section 15.219, the input power and the combined lengths of the antenna, connecting cable and ground must comply with the limits in that section.
There is no need to check for compliance under Section 15.209 when the transmitter was certified under Section 15.219. If the 15.219 system exceeds the standards in that section, it is in violation of the rules.
Of course, if the 15.219 system exceeds those specifications the radiated emissions also will exceed the 15.209 limits. The field inspection folks may check for both simply to show that the system is not compliant under any of the possible standards."
-John Reed
But anyway, from there the discussion pointed to some threads at the forums where member Ermi Roos and Neil (radio8z) had already been underway researching the origins of Part 15.
In Neil's research, he had deduced a feasible possibility of the origins of Part 15 broadcasting from bits and pieces puzzled together over the span of the years, and suggested a reasonable possibility of  how it was Part 15 had originally came into existence, and voiced it to the community....

"..The best I have been able to piece together is that following the "Communication Act of 1934" is that in 1937 the rules were amended to allow for what we now know as Part 15 for AM. The intent, as I understand it, was to allow for the use of "phono oscillators" whereby the very expensive audio amplifiers and speakers already used for ratio reception could serve double duty by not only providing for off the air material but also for folks to play their own records through their existing radios..
Phono oscillators were the first part 15 type devices.
Used to broadcast from record player to a nearby radio
Unfortunately, I have no historically valid references for this. I do recall that when I went on the air in 1959 with my KnightKit AM transmitter it was regulated by part 15.211. Where did that go? Perhaps others here, especially Ermi, could comment on this. -Neil Post #28

Neil also had some intriguing theories (not included here) on why the specific 100mw input measurement was implemented, which might have had to do with the actual operating components, voltage and temperatures of the fore mentioned phono-occilators. Neil's proposal, even to an non-technical minded person as myself makes reasonable sense. You can read about in the mist of discussion in the linked thread. But for the sake of getting staying on track, we're going to take a look at what Ermi was discovering...

It is true that, as we learned from Neil, that, in the 1930s, the FCC originally intended Part 15 AM for phono oscillators inside the home. However, Part 15.221, which is intended for outdoor use that is something like community broadcasting, was not adopted until 1990. The FCC uses impractically low field strength limits for 15.221. .. 
LBP provided the  Part 15 carrier current system at Disney World
LPB petitioned the FCC for Section 15.221, and got it. I don't know how close Section 15.221 is to what LPB originally asked for. -Ermi Roos Post #

Ermi, who also was turning up only bits and pieces, sought to track down more specifics about, amongst other things, the story behind the .219 rule, and eventually delved into official channels of communications with the FCC and succeeded in receiving an official response from John A. Reed, the Senior Engineer in the FCC Office of Engineering and Technology, Technical Rules Branch. Ermi was surprised by the wealth of information which had been provided... 
"...The only question I asked the FCC was: When did they first enact the rules that are presently in Section 15.219? I was pleased when I received much more than what I asked for. John Reed told me the complete history of the rules governing unlicensed transmitting on the AM broadcast band. He provided a valuable service to the Part 15 AM community by explaining the intent of the rules and showing that the intent had not changed at all since they were first established in 1938..." -Ermi Roos Post #42 

Ermi had basically received the entire story of Part 15, and in-turn presented it to us (in post #40), as explained verbatim from the corresponded response of John Reed (shown below)..
Beginning in 1938 as Rule 25.02, and ended with our present day Rules 15.209 and 15.219.
This is how all of our Part 15 stations came to be.
Below is a copy of John Reeds response in it's entirety. The BOLD CAPITALS inserts and paragraph breaks are mine, and not from the actual letter. I've included this to emphasize key points and make it easier to follow the history provided. Other than that, all info is exactly as stated, and in the sequence as John Reed presented it.



"The original regulation, Rule 25.02, adopted November 21, 1938, (and currently stated only in Section 15.221(a)) permitted any operation on any frequency provided the field strength did not exceed 15 uV/m at a distance of Lambda/ 2 Pi.

Sometime after July 1, 1939, and before October 27 , 1939, this rule was renumbered Rule 2.102.
On July 21, 1948, in FCC 48-1837, this rule was again redesignated as Section 15.02.
On December 21, 1955, in Docked No. 9288, this rule was again redesignated as Section 15.7.

"On July 18, 1957, in Docket No. 9288, the Commission provided specific provisions for unlicensed operation in the AM band in what would be designated as Sections 15.202, and 15.204 of its regulations.
Section 15.202 stated that the field strength limits shall not exceed 24000[/f(kHz)] uV/m at a distance of 100 feet.
Section 15.204 was adopted as an alternative to the field strength limit to avoid the difficulties in making field strength measurements, provided that the input power to the final stage did not exceed 100 mW and the combined length of the antenna plus connecting lead did not exceed 10 feet.

While the Commission originally proposed to permit an input power of 200 mW in the AM band (3rd Notice of Proposed Rule Making in Docket 9288 adopted November 8,
1956), the adopted limit was reduced to 100 mW to reduce the potential area of interference.

"In an Order adopted on November 12, 1974 (FCC 74-1221), the rules were again modified, redesignating 15.202 as Section 15.111 and Section 15.204 as Section 15.113.
Section 15.113 was modified to include the length of the ground lead in addition to the length of the antenna and connecting lead in the 10 feet maximum. This change
was added because the earlier rules had not contemplated anyone using an extended ground plane [lead] to extend the range. The change was made to stop this practice.

"On April 14, 1976, in Docket No. 20780, the Commission proposed several changes in Sections 15.111 and 15.113, but did not adopt any of these changes. Paragraph 16, however, made the Commission's intentions clear that it implemented the alternative power measurements in lieu of a field strength limit to make it easier for home builders, that didn't have the means to perform field strength measurements, to demonstrate that their products complied with the standards. However, this rule was never intended to provide a greater operating range than the original field strength limit. The operating ranges were expected to be about equal, but improvements in efficiency were starting to result in increased range, and increased potential interference, for systems operating under Section 15.113.

"Finally, on March 30, 1989, in ET Docket 87-389, the Commission adopted the current regulations. Section 15.111 was incorporated into Section 15.209 without changing the radiated emission limits except to specify the measurement range as 30 meters instead of 100 feet. Section 15.113 was redesignated as Section 15.219 with the only change to the limit being to specify the combined length of the antenna, connection lead and ground lead as 3 meters instead of 10 feet.

Also in this order, the Commission established Section 15.221 to permit unlicensed operation in the AM broadcast band on the campus of any educational institute provided the emissions do not exceed the limits in 15.209 as measured from the campus boundary. On November 26, 1990, again in ET Docket No. 87-389, the Commission modified section 15.221 to permit carrier current systems to operate under the older limit of 15 uV/m at Lambda/2 Pi as an alternative to the field strength limits in Section 15.209.

That's the basic history. Let me know if you have any further questions.


The day we almost lost the benefits of 15.219
It should be closely noted that the regulation which is now our 15.219, underwent the amended change in 1974 to include the ground lead in the 100ft/3meter rule, specifically with the objective to completely insure that only a very limited range was achievable.. and when the FCC realized that even without that radiating ground lead, 15.219 was still very capable of exceeding the imposed limitations as of that in .209..
It was at this point in 1976 that the FCC had came very close to amending the 15.219 rule for the second time, with an even further limit imposed in .219, so to finally put a stop to extended range capability altogether...
Why they ultimately chose not amend the rule is unclear, but it is certain that if they had, most of our part 15 stations would more likely be broadcasting to the next room, and not the entire neighborhood. I suspect they didn't change it perhaps as not to hinder it's other industry uses, but that's just speculation.

The point is: We're fortunate to have what we've got, because we never were intended to have it, not to the extent of which we received. Beneficial to us is that it's the actual rules and not the original intentions themselves that govern the legality of our installations.

 Ermi commented the same, in his observation concerning the information provided by John Reed, which equally emphasize how fortunate we really are that the proposed rule change in 1976 was never adopted, we got lucky, which is something which should be considered before anyone considers bending the rules or petitioning for greater Part 15 allowances as some have expressed..

"..The original rule had a field strength limit that was close to what is in Section 15.209 today. Section 15.209 appears to us to be very restrictive compared to 15.219, but the FCC's intent in establishing 15.219 was to provide a means for hobbyists, who are not likely to have access to a field strength meter, to demonstrate compliance with the original rule, which is similar to 15.209. The FCC did not intend for 15.219 to allow greater range than 15.209.."-Ermi Roos

So again, keep that in mind, and realize how lucky we are that the proposed changes to 15.219 in 1976 was not adopted, and run your stations in a respectable and legal manner, so not to incite possible reactions by the FCC to possibly again consider an amendment to this rule, which as it stands, provides us the ability of serving our local community on the public airwaves in a less limiting and reasonable capability.

By the way.. Don't you wish they had followed through with the original 200mw input proposal instead of the 100mw which it decided on?... sigh..


You may wish to reveiw some previous post related to this subject:

The elusive FCC 22 page document and it's relation to 15.219

NOUO Notices of Unlicensed Operation
Every NOUO in the AM band from Jan. 2011 thru Jan. 2014 (There were 7 of them).

Intended use of Part 15 in the eyes of the FCC
"..Moreover, regardless of strict adherence to the technical limitations in Part 15, a Low Power Communication Device is permitted to operate on a sufferance basis
only,.. ..The Commission never intended that Part 15 be used to establish a low power broadcast facility to service an entire community..."

The 200 Foot Elephant
The rule that's not a rule.

Also see:
Part 15 Distiction and the Battle Against Piracy

FCC “Pirate” Advisory Flawed