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Post by Druid Hills Radio on Jan 29, 2018 18:36:34 GMT
Nicely written and covers most of the bullet points. I was a bit baffled by the cover photo that seems to imply an elevated installation and what appears to be a 160 meter ham stick as opposed to the stainless steel whip that is specified in the Rangemaster manual.
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Post by End80 on Jan 30, 2018 1:38:11 GMT
Funny you should mention that as I noticed the same thing just two days ago and asked about it. Bill replied he had used that shorter whip to get the field strength levels to conform with the 15.221 campus perimeter rule. A standard 102" whip was producing too hot a signal at the perimeter, even with the xmtrs power at minimum, so he used that whip to cool the signal further. www.hobbybroadcaster.net/community/index.php?topic=6470.msg39993#msg39993
But I agree he shouldn't have used that picture because it seems odd.
The free pdf book Druid is talking about can be downloaded here: www.hobbybroadcaster.net/resources/free-part-15-radio-broadcasting-ebook.php
By the way, I have always used a 102" fiberglass whip on my Rangemaster, but it doesn't have that coil wrap thing going on around the antenna. |
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Post by Deleted on Jan 30, 2018 4:41:41 GMT
Posting a link to a specific post in an HB thread doesn't do much if you aren't a member of that Forum, as you'll always be routed to the first message.
I read the e-book a while ago and thought that it gave a good overview of the hobby. Of course, you can't be all that comprehensive in a 13 page book (with a lot of photos).
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Post by End80 on Jan 30, 2018 5:53:59 GMT
Posting a link to a specific post in an HB thread doesn't do much if you aren't a member of that Forum, as you'll always be routed to the first message. I read the e-book a while ago and thought that it gave a good overview of the hobby. Of course, you can't be all that comprehensive in a 13 page book (with a lot of photos).
Well maybe you should be a member! I know there are frustrations amongst some but it's time to let thing go.. no?
Anyway, I explained what he said, but if you prefer here's a direct quote of what was said:
Quote from: End80 on January 27, 2018, 09:22:37 AM:
By the way, and this is besides the point but I just noticed the Rangemaster on the cover is using a wire wrapped fiberglass whip (not sure if that's the right term), I've seen that type wrap on shorter CB antennas before, but that's the first time I ever noticed seeing one a 102" whip.
Reply from: Bill DeFelice on January 28, 2018, 08:29:59 AM:
I don't recall what recent thread reply I mentioned it in, but I had used that shorter "102-inch" whip to get the field strength on the campus dialed in at the perimeter to meet the 15.221 regulation. A standard straight whip gave me a signal that was a bit too hot at the perimeter, even with the transmitter's power control all the way at minimum.
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Post by Admin on Jan 30, 2018 17:51:20 GMT
I'm not a member of HB.
The link took me directly to the download page where I was able to obtain the PDF file.
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Post by Druid Hills Radio on Jan 30, 2018 18:06:12 GMT
Posting a link to a specific post in an HB thread doesn't do much if you aren't a member of that Forum, as you'll always be routed to the first message. I read the e-book a while ago and thought that it gave a good overview of the hobby. Of course, you can't be all that comprehensive in a 13 page book (with a lot of photos).
Well maybe you should be a member! I know there are frustrations amongst some but it's time to let thing go.. no?
Anyway, I explained what he said, but if you prefer here's a direct quote of what was said:
Quote from: End80 on January 27, 2018, 09:22:37 AM:
By the way, and this is besides the point but I just noticed the Rangemaster on the cover is using a wire wrapped fiberglass whip (not sure if that's the right term), I've seen that type wrap on shorter CB antennas before, but that's the first time I ever noticed seeing one a 102" whip.
Reply from: Bill DeFelice on January 28, 2018, 08:29:59 AM:
I don't recall what recent thread reply I mentioned it in, but I had used that shorter "102-inch" whip to get the field strength on the campus dialed in at the perimeter to meet the 15.221 regulation. A standard straight whip gave me a signal that was a bit too hot at the perimeter, even with the transmitter's power control all the way at minimum.
That doesn't make any sense what he said. Why would he be running under 15.221? Why not 15.219 at 100 mW? The ONLY time one would be running 15.221 was if they were in the middle of the campus and running over 100 mW, then the perimeter comes into play. I own 2 Rangemasters. Something doesn't sound right. |
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Post by End80 on Jan 30, 2018 18:41:23 GMT
It's a high school station Druid, the signal can not exceed a certain limit when measured at the perimeter of the campus..
§ 15.221 Operation in the band 525-1705 kHz.
(a) [refers to carrier current so I'll skip that]
(b) As an alternative to the provisions in paragraph (a) of this section, intentional radiators used for the operation of an AM broadcast station on a college or university campus or on the campus of any other education institution may comply with the following:
(1) On the campus, the field strength of emissions appearing outside of this frequency band shall not exceed the general radiated emission limits shown in § 15.209 as measured from the radiating source. There is no limit on the field strength of emissions appearing within this frequency band, except that the provisions of § 15.5 continue to comply.
(2) At the perimeter of the campus, the field strength of any emissions, including those within the frequency band 525-1705 kHz, shall not exceed the general radiated emission in § 15.209.
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Post by End80 on Jan 30, 2018 18:44:17 GMT
I'm not a member of HB. The link took me directly to the download page where I was able to obtain the PDF file. That's correct, the HB site itself is fully accessible, it is only the forums which has limited access. |
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Post by Druid Hills Radio on Jan 30, 2018 19:15:43 GMT
It's a high school station Druid, the signal can not exceed a certain limit when measured at the perimeter of the campus..
§ 15.221 Operation in the band 525-1705 kHz.
(a) [refers to carrier current so I'll skip that]
(b) As an alternative to the provisions in paragraph (a) of this section, intentional radiators used for the operation of an AM broadcast station on a college or university campus or on the campus of any other education institution may comply with the following:
(1) On the campus, the field strength of emissions appearing outside of this frequency band shall not exceed the general radiated emission limits shown in § 15.209 as measured from the radiating source. There is no limit on the field strength of emissions appearing within this frequency band, except that the provisions of § 15.5 continue to comply.
(2) At the perimeter of the campus, the field strength of any emissions, including those within the frequency band 525-1705 kHz, shall not exceed the general radiated emission in § 15.209.
I know that. My question is why would he be running 15.221 instead of 15.219? And as far is not being able to adjust it down is total fiction. |
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Post by End80 on Jan 30, 2018 20:46:54 GMT
I know that. My question is why would he be running 15.221 instead of 15.219? And as far is not being able to adjust it down is total fiction. I guess I don't understand your point.. It's a school station on a campus so he's operating under .221 Are you saying a campus install also has the option to run 15.219? (to be honest I'm really not sure, I've not explored any of that route), if that's the case then maybe he chooses 15.221 to teach and illustrate the methods involved with campus broadcasting since a school campus is the location of the install of the students operating it... I don't know, that's just a guess. But regardless the reason, why is something so wrong about it? Because he's not utilizing the rules to their maximum potential? - Maybe he wants to be absolutely certain not to risk a NOUO - because if it got cited, then that would seriously diminish any legitimacy of what he's been promoting all this time. There are antique radio collectors who choose to broadcast extremely limited range AM, is something not right about that too? I guess I just don't understand where you're coming from. More is not always the best option. |
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Post by End80 on Jan 30, 2018 20:59:28 GMT
My view:
When someone operating under part 15 is broadcasting for miles - that's when I say "Something doesn't sound right"
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Post by Deleted on Jan 30, 2018 23:34:11 GMT
You can use Part 15.219 anywhere. The reason 221 exists is to recognize that 219 might not be enough for some school/campus properties. There's no reason to NOT use 219 if it will do the job for a small campus. The explanation given doesn't seem right, as Druid Hills states, unless it was used as a training exercise.
I moderated my own post. Suffice it to say that for a number of reasons, I won't be joining HB anytime soon.
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Post by End80 on Jan 31, 2018 2:50:42 GMT
I don't know Dave. But I don't see the first thing wrong with -for whatever the reason may be- choosing to limit range so it will cover only a selected area. I don't know why he did it I don't care why he did it. I don't see anything wrong with doing it. And I don't understand for the life of me why you find it to be so objectionable that he did do it!
Best that I can surmise is that he did not want the signal to leave the campus property.. So what?
You obviously don't like him, which you have the right to, but really?.. his part 15 signal is not strong enough for you? His antenna is too short?
Come on Druid! |
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Post by jimhenry2000 on Jan 31, 2018 5:14:28 GMT
Nicely written and covers most of the bullet points. I was a bit baffled by the cover photo that seems to imply an elevated installation and what appears to be a 160 meter ham stick as opposed to the stainless steel whip that is specified in the Rangemaster manual. That was one of the first things I read when I decided to get into Part 15 a year or so ago. Then I seemed to get banned for no reason I was made aware of... |
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Post by Deleted on Jan 31, 2018 5:42:53 GMT
I think that a photo of a more typical Part 15 installation and antenna (i.e., one that isn't "odd", as you put it) would be more suitable for an introductory treatise to the hobby.
I've had some issues with Bill's actions and opinions, but it's never been about liking (or not liking) him.
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