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281. Re: [RTTY] Heathkit SB-1000 On RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 24 Sep 2012 22:27:20 -0400
The data sheet specifies "CW or PEP" and does not give any pulse duration specifications. By definition PEP can't be 100% duty cycle. One could do a lot of mathematical gymnastics comparing RTTY to
/archives//html/RTTY/2012-09/msg00127.html (9,889 bytes)

282. Re: [RTTY] Heathkit SB-1000 On RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 25 Sep 2012 10:01:00 -0400
Of course it can. You are confusing duty cycle with average power output. OK, make that 100% duty cycle at full output. Once you add a PEP qualifier you're derating the tube ... or you're at least i
/archives//html/RTTY/2012-09/msg00132.html (11,625 bytes)

283. Re: [RTTY] Heathkit SB-1000 On RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 25 Sep 2012 11:16:29 -0400
The manual for the Heathkit SB-1000 says a maximum plate current of 400 mA for CW and 550 mA on SSB. The Heathkit manual rating is significantly in excess of Eimac's own *MAXIMUM* PEP value for SSB.
/archives//html/RTTY/2012-09/msg00137.html (9,923 bytes)

284. Re: [RTTY] Heathkit SB-1000 On RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 25 Sep 2012 11:31:02 -0400
REPLY: I disagree. The "carrier conditions" you quote are for Class C plate modulated operation. This is not how the SB-1000 operates. Plate current is plate current, plate dissipation is plate dissi
/archives//html/RTTY/2012-09/msg00138.html (12,764 bytes)

285. Re: [RTTY] Heathkit SB-1000 On RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 25 Sep 2012 18:08:24 -0400
In our discussion regarding the SB-1000 all the above is irrelevant anyway since the SB-1000 does NOT run class C. Use the specs for class B (older data sheet) or class AB2 (newer data sheet) and you
/archives//html/RTTY/2012-09/msg00145.html (11,414 bytes)

286. Re: [RTTY] RTTY Filter INRAD filter # 708 250 Hz (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 08 Nov 2012 20:42:21 -0500
The theoretical "necessary bandwidth" of a 170 Hz shift 45.45 baud signal is around 370 Hz. 250 Hz filters work for the same reason that a 6 or 10 dB attenuator will often improve copy of the low ban
/archives//html/RTTY/2012-11/msg00029.html (9,303 bytes)

287. Re: [RTTY] USB DIGI KEYER II (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 19 Nov 2012 14:55:06 -0500
Some microHAM devices, specifically USB interface II and USB Interface III which do not use internal microprocessors, function as USB-serial and (in the case of USB Interface III) USB Audio Class de
/archives//html/RTTY/2012-11/msg00089.html (10,093 bytes)

288. Re: [RTTY] Announcing NEW FMRE RTTY Contest Rules (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 06 Dec 2012 20:37:34 -0500
Alejandro, Sorry, that does not answer the question. Are SO2R techniques such as rapid band changes, working stations alternately on different bands, etc. not permitted - in other words are there no
/archives//html/RTTY/2012-12/msg00042.html (10,810 bytes)

289. Re: [RTTY] Announcing NEW FMRE RTTY Contest Rules (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 07 Dec 2012 00:11:21 -0500
maybe Alex think is BAN but in the Rules is not BAN, there is a good If the intent was to ban SO2R, the only way to accomplish that is to limit the number of band changes per hour or require minimum
/archives//html/RTTY/2012-12/msg00046.html (15,600 bytes)

290. Re: [RTTY] Commercial Interfaces (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 09 Dec 2012 19:37:56 -0500
You're really talking about apples and oranges when comparing Rascal or Donner (which are really nothing more than a couple single transistor switching circuits - about $2 in parts for Donner) and mi
/archives//html/RTTY/2012-12/msg00064.html (9,420 bytes)

291. Re: [RTTY] Commercial Interfaces (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 10 Dec 2012 09:37:16 -0500
You also need to make sure that any commercial thing you get is certified for Windows 8 as there are reports out that some don't work with Windows 8. In fact, you need to *avoid Windows 8*. Windows 8
/archives//html/RTTY/2012-12/msg00068.html (9,939 bytes)

292. Re: [RTTY] Commercial Interfaces (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 10 Dec 2012 11:07:03 -0500
All interfaces require a driver of some kind and Windows 8 (or some of the OEM versions of Windows 8) has broken several of the hardware drivers. Windows 8 is the new "Vista" and will have corporatio
/archives//html/RTTY/2012-12/msg00071.html (10,808 bytes)

293. Re: [RTTY] Commercial Interfaces (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 10 Dec 2012 11:35:12 -0500
Is not going to be quick. There are too many bugs in the OEM versions of Windows 8. I've shelved *any* plans to update my personal systems so will not have a Windows 8 platform at all. 73, ... Joe, W
/archives//html/RTTY/2012-12/msg00076.html (12,091 bytes)

294. Re: [RTTY] Commercial Interfaces (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 10 Dec 2012 11:38:31 -0500
Your serial ports have drivers. If you happened to be using USB to serial converters those driers *would have problems* with Windows 8. The issue is with improper initialization on start-up because o
/archives//html/RTTY/2012-12/msg00077.html (12,209 bytes)

295. Re: [RTTY] Commercial Interfaces (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 10 Dec 2012 23:02:20 -0500
Yea, you have it available, but there are no combo of ham applications that would command (or even take advantage of the option) to use up that much space. Many logging applications can make use of >
/archives//html/RTTY/2012-12/msg00101.html (16,692 bytes)

296. Re: [RTTY] USB Dongle Sound Cards (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 11 Dec 2012 22:26:52 -0500
I've been through countless control panels and sound card control apps, trying both line in and mic, looking for the secret sauce to get MMTTY to see separate channels, and I've only gotten a couple
/archives//html/RTTY/2012-12/msg00111.html (10,291 bytes)

297. Re: [RTTY] BARTG Sprint 2013 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 07 Jan 2013 23:32:15 -0500
Likewise, although the FCC is a federal authority, it makes sense that when you move from one call district to another that you get a call sign that corresponds to the call district you now reside in
/archives//html/RTTY/2013-01/msg00084.html (13,989 bytes)

298. Re: [RTTY] US call signs (BARTG) (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 08 Jan 2013 11:47:41 -0500
Phil, Make it simple ... instead of only a serial number include the multiplier in the exchange. That way if you were GU0SUP on the mainland your exchange would include G ... if I were to operate por
/archives//html/RTTY/2013-01/msg00110.html (10,491 bytes)

299. Re: [RTTY] RTTY Now trashy signals (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 08 Jan 2013 16:47:50 -0500
And far too many AFSK users run their sound cards "sliders up full" into mic inputs that clip even before the mic gain control. With clipping in the mic input any wave shaping in the AFSK modem is l
/archives//html/RTTY/2013-01/msg00124.html (8,675 bytes)

300. Re: [RTTY] US call signs (BARTG) (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 08 Jan 2013 17:04:54 -0500
Perhaps it would have been far better in the US if a W6xx ( perhaps a vanity call ) was the ONLY licence with W?xx. Then, when W6xx moved to Fla, all he would have to do is sign W4xx. Simples! Let's
/archives//html/RTTY/2013-01/msg00125.html (12,438 bytes)

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