Thanks to all for your replies and suggestions. My first thought was that it's probably time to replace the filter capacitors, but I thought it would be just as wise to ask around and find out if anybody had other ideas.
73 & tnx agn! Jude WD9FUM > From: [email protected] > Subject: Drakelist Digest, Vol 36, Issue 13 > To: [email protected] > Date: Sun, 12 Jun 2011 20:23:29 -0400 > > Send Drakelist mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.zerobeat.net/mailman/listinfo/drakelist > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Drakelist digest..." > > > Today's Topics: > > 1. strange noise in tuning. ([email protected]) > 2. Re: value of early drake gear (Garey Barrell) > 3. Re: value of early drake gear (Paul Christensen) > 4. AC-4 Issue (Windows Live Team) > 5. Re: AC-4 Issue (Jim Shorney) > 6. Re: AC-4 Issue (Robert Ladden) > 7. Re: AC-4 Issue ([email protected]) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 12 Jun 2011 13:30:56 -0400 > From: "[email protected]" <[email protected]> > To: [email protected] > Subject: [Drakelist] strange noise in tuning. > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > > Was playing with my R-4 today and noticed a" birdie" very strong on 20 > and 17 meters. Almost as strong as the cal tone.Showed up on 14150,210 ,275 > and 335. On 17 showed up at 18120,135, and 145. Pulled the ant connection and > gone,the R4 is silent except for a little white noise. If I pull the 2' > jumper coax off the ant switch,but still connected to the R-4 , the birdie > still there and as loud as when the switch is connected to the antenna. the > rig seems to hear fine on both bands,just the birdie is always there. If I > pull the jumper coax from the switch,short the coax, still there. > On the same antennas and antenna switch, my S-line does not have the > birdies, nor does my Flex 1500. I also noticed on the R-4,This seems to come > and go, that it is harder to tune to a CLEAN sounding audio on ssb,always > seems a bit rough and not right on. > any ideas where to look. > thanks > dale wt4t > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mailman.zerobeat.net/pipermail/drakelist/attachments/20110612/8e1413cc/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Sun, 12 Jun 2011 16:47:25 -0400 > From: Garey Barrell <[email protected]> > To: "[email protected]" <[email protected]> > Cc: [email protected] > Subject: Re: [Drakelist] value of early drake gear > Message-ID: <[email protected]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Dale - > > The only significant difference between the R-4 and the Early R-4A is > that the 'A' has a solid state (Bipolar) PTO and BAND oscillator. So > the 'A' is more stable and quicker to stabilize from turn-on. The R-4 > is very like the 2-B, functionally, just with a linear PTO and 1 kHz > calibration. The Late R-4A has a few more stages converted from tube to > SS, NONE of which are in the direct RF/IF signal path. Some claim the > tube type Product Detector used in the 2-B - Early R-4A has lower > distortion than the two-diode PD used in the rest of the R-4A/B/C > receivers. The "B" added the 25 kHz calibrator, and changed the PTO to > an FET after the first 1000 receivers, and but that's about the only > functional differences. There were several cosmetic changes, the most > important of which, at least to me, was changing from 'natural' > lettering 'above the belt' to black printing. The tilted MAIN TUNING > knob skirt was much less susceptible to glare, and the 'PTO in Use' > fiducial was a nice change. There were small circuit changes, mostly > values in the AVC, NB and a couple other places, but nothing drastic. > > I still think the "B" is the best of the bunch, if for no other reason > than that the design is the same as the R-4, just refined after building > about 7000 of the earlier versions.! > > Personally, I think the Sherwood R-4C is 'better', ONLY if you need the > close in IM protection. Let's face it, about the only place you find > that to be a problem is either on low band contest weekends or low band > DX pileups. For day to day hamming in our relatively wide open bands, I > prefer the Passband tuner to the crystal filters. I find the steep > sided crystal filters to have a 'harsher' sound, and I like to know > what's going on around 'MY' frequency, just at reduced levels. > > I have at least two each of the R-4(any) receivers, and the B-Line is > the pair on the main desk. The 7 Line is nice on the other desk, but if > you can't 'dip the plate'..... The S-Line and the rest are shelved or > in a closet, or the garage. > > As my baby sister used to say, 'Tweechies own'! :-) > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line > and TR-4/C Service Supplement CDs > <www.k4oah.com> > > > [email protected] wrote: > > Have a very nice Drake R4/T4X/ AC-4/ MS-4 all the gear is real clean > > and operates just fine. My question is why is the early 4 line gear > > worth next to nothing, when compared to the rest of the 4 line. I have > > owned a B-line,a C-line in the past ,both good performers,B being my > > choice between the two. I find the early 4 line performance ,from my > > ear and operation just as good as my B-line. Of course I never had the > > chance to run them side by side,and the mind can play tricks, they > > perform so close in real life operation,they seem almost the same to > > me. Watching QTH and Ebay I see the 4A and 4B gear go for twice the > > price all most all the time ,over the 4 gear. I realize that Drake > > made some mechanical and operational changes thru the years,but basic > > radio performance is not that different. I had a full Drake/Sherwood C > > line , and it was the BEST of the lot,but they will go for BIG $$$ > > used. I was just curious, so I thought I would as a few others opinions . > > thanks for reading. > > dale wt4t > > > > > > > > ------------------------------ > > Message: 3 > Date: Sun, 12 Jun 2011 18:35:34 -0400 > From: "Paul Christensen" <[email protected]> > To: <[email protected]> > Subject: Re: [Drakelist] value of early drake gear > Message-ID: <A30F6FCB02574A92BB5A0202673052E3@DBTOA000> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=response > > > "...worth next to nothing, when compared to the rest of the 4 line. I have > > owned a B-line,a C-line in the past ,both good performers,B being my > > choice between the two. I find the early 4 line performance ,from my ear > > and operation just as good as my B-line. Of course I never had the chance > > to run them side by side..." > > For the past month, I've been running my R-4B and Sherwood R-4C > side-by-side. The R-4B has been a more enjoyable receiver to use, although > the "modded" R-4C is incredibly good in tight band spaces among strong > signals. High S/N R-4Cs seem to command the highest prices in the 4 line, > but if one wants to later change the R-4C with all the Sherwood mods, I'm > not sure why a high S/N matters. The only real consideration in my > selection among S/Ns had to do with getting one with metal/Nylon mesh gears > only because to me, that combination produces the most solid tuning feel > among the dozen or so R-4Cs I've owned in the last twenty years. My R-4C is > around S/N 26,950. > > When I received my R-4B earlier this year, it was my first. I absolutely > hated it. But the root cause for that hate was in the power supply > filtering. Enough ripple had caused CW and SSB transmissions to sound > "fuzzy," resulting in a high amount of audio IMD. The fuzz went away when > the main supply cap was changed and that lead to my OCD taking over and > making many other changes to the R-4B that are documented in the list > archives. > > The R-4B is capable of truly Hi-Fi audio. Unfortunately, the R-4C's > greatest strength is also one of its greatest weaknesses. For example, > low-frequency (below ~ 300 Hz) and upper SSB frequency audio response is > forever compromised owing to the use of cascaded crystal filters. In recent > years with DSP transmit IF schemes, enough SSB stations have now expanded > the TX SSB audio passband to 100Hz - 3000 Hz where the difference in > perceived audio balance can be remarkable in instances when the received > signal strength is strong. This distinction can be easily heard with the B, > but not the C. In a nutshell, my R-4C will be used for tough band > conditions and the R-4B used for ragchews on both SSB and CW. > > Paul, W9AC > > > > > > > > ------------------------------ > > Message: 4 > Date: Sun, 12 Jun 2011 23:37:44 +0000 > From: Windows Live Team <[email protected]> > To: <[email protected]> > Subject: [Drakelist] AC-4 Issue > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > AC4 keeps blowing fuses when the power to the T4XB is turned on. Anybody have > ideas? > > Thanks & 73, > > Jude WD9FUM > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mailman.zerobeat.net/pipermail/drakelist/attachments/20110612/a8d31446/attachment-0001.html> > > ------------------------------ > > Message: 5 > Date: Sun, 12 Jun 2011 18:47:16 -0500 > From: "Jim Shorney" <[email protected]> > To: "[email protected]" <[email protected]> > Subject: Re: [Drakelist] AC-4 Issue > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > On Sun, 12 Jun 2011 23:37:44 +0000, Windows Live Team wrote: > > >AC4 keeps blowing fuses when the power to the T4XB is turned on. Anybody > >have ideas? > > Something is shorted somewhere in the power supply or radio. > > 73 > > -Jim > > > -- > Ham Radio NU0C > Lincoln, Nebraska, U.S.S.A. > TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, > HyGain 3750, IBM PS/2 - all vintage, all the time! > > "Give a man a URL, and he will learn for an hour; teach him to Google, and he > will learn for a lifetime." > > HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ > http://incolor.inetnebr.com/jshorney > http://www.nebraskaghosts.org > > > > > > ------------------------------ > > Message: 6 > Date: Sun, 12 Jun 2011 16:49:24 -0700 (PDT) > From: Robert Ladden <[email protected]> > To: [email protected] > Subject: Re: [Drakelist] AC-4 Issue > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > First check out the AC-4. Start > with?http://www.wb4hfn.com/DRAKE/DrakeArticles/TechTips/PowerSupplyTroubleshooting.htm > 73,Bob WW3QB > > --- On Sun, 6/12/11, Windows Live Team <[email protected]> wrote: > > From: Windows Live Team <[email protected]> > Subject: [Drakelist] AC-4 Issue > To: [email protected] > Date: Sunday, June 12, 2011, 7:37 PM > > > > > > > AC4 keeps blowing fuses when the power to the T4XB is turned on. Anybody have > ideas? > > Thanks & 73, > > Jude WD9FUM > > > -----Inline Attachment Follows----- > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mailman.zerobeat.net/pipermail/drakelist/attachments/20110612/7e0a2dda/attachment-0001.html> > > ------------------------------ > > Message: 7 > Date: Sun, 12 Jun 2011 20:22:36 -0400 > From: "[email protected]" <[email protected]> > To: [email protected] > Subject: Re: [Drakelist] AC-4 Issue > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > > > > > > > > > > > -----Original Message----- > From: [email protected] <[email protected]> > > > JUDE > Separate the supply from the radio , put in a new fuse, jumper position 1 > and 2 on the end of the power cable, a heavy short piece of wire, and plug in > the supply. If the fuse does NOT blow, looks like you have a problem in the > rig. Get the schematic of the supply and if the supply looks good,check the > supply voltages. BE CAREFUL, VOLTAGES ON THE SUPPLY CAN KILL YOU. > good luck > dale wt4t > > > > > > > > > > > -----Original Message----- > From: Windows Live Team <[email protected]> > To: [email protected] > Sent: Sun, Jun 12, 2011 7:37 pm > Subject: [Drakelist] AC-4 Issue > > > AC4 keeps blowing fuses when the power to the T4XB is turned on. Anybody have > ideas? > > Thanks & 73, > > Jude WD9FUM > = > > _______________________________________________ > > > > > > Drakelist mailing list > > > > > > [email protected] > > > > > > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mailman.zerobeat.net/pipermail/drakelist/attachments/20110612/a90f8b4c/attachment.html> > > ------------------------------ > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > End of Drakelist Digest, Vol 36, Issue 13 > *****************************************
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