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Re: More Murania Mods
Jim WB2LHP in MI <jmarco1955@...>
So, of course, I made a mistake...Fat fingers and old eyes...I mistyped the total number of turns for L1...It is 61 turns, not 51 turns...Sorry for the error...Jim WB2LHP
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[4SQRP] Murania on 5 MHz?
Jim WB2LHP in MI <jmarco1955@...>
---------- Forwarded message --------- From: Jim Marco <jmarco1955@...> Date: Wed, Oct 24, 2018 at 8:46 PM Subject: Re: [4SQRP] Murania on 5 MHz? To: <main@4sqrp.groups.io> Cc: <muraniakit@...> So, of course, I made a mistake...Fat fingers and old eyes...I mistyped the total number of turns for L1...It is 61 turns, not 51 turns...My tap is 14 turn from the top of the coil if you want to experiment above the AM broadcast band, which I did not...Sorry for the error... No pictures but you get the idea...73 Jim WB2LHP
On Wed, Oct 24, 2018 at 5:20 PM Dwayne R via Groups.Io <masterdr=yahoo.com@groups.io> wrote: Hello Jim. . .
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Re: Stations heard
Everett Catlin
On Wednesday, October 24, 2018, 9:39:40 PM UTC, Everett Catlin <everettcatlin@...> wrote:
On Wednesday, October 24, 2018, 9:27:45 PM UTC, Everett Catlin <everettcatlin@...> wrote:
Hi All, My Pup got me up at 0500 local today. I turned on my un- modified Murania and heard WBAP, WBBM , WGN, WSM (local), WHO, WLS, WSB, WTAM (local), WOAI, WAKM (local) and my old favorite WWL. This is not bad for a one transistor and one IC.I had much fun this morning. I am located in Columbia, Tn. Dave Cripe did a great job in the design of this radio. 73 Everett Catlin N5MZX
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Stations heard
Everett Catlin
Hi All, My Pup got me up at 0500 local today. I turned on my un- modified Murania and heard WBAP, WBBM , WGN, WSM (local), WHO, WLS, WSB, WTAM (local), WOAI, WAKM (local) and my old favorite WWL. This is not bad for a one transistor and one IC.I had much fun this morning. I am located in Columbia, Tn. Dave Cripe did a great job in the design of this radio. 73 Everett Catlin N5MZX
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Simple Murania mod offers improved performance
Jim WB2LHP in MI <jmarco1955@...>
Here is a simple mod that will produce better performance from the very fine Murania radio...It is completely reversible and requires no hacking of the radio...
I live 5 miles from a 50kW AM station which tends to overload the detector in the TA7642 IC...Here's the fix... FLOAT the wiper lug of R3 Place a jumper between the PADS for the R3 wiper and the high side of R3 Lift the leg of R1 that intersects with R2 and R3 Connect a jumper between the floated leg of R1 and the wiper of R3 Done... This allows R3 to control the gain of the detector stage in the TA7642...The audio amp runs wide open...Adjust R3 for the best sounding audio...R3 now acts similar to a regenerative control where there is both volume and gain reaction... This mod comes from my own experimenting and information gleaned off the Internet...Give it a try...I think you'll be pleased with the results... 73 Jim WB2LHP in MI
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More Murania Mods
Jim WB2LHP in MI <jmarco1955@...>
Here are some additional mods for the Murania radio...These are easy to do and are completely reversible without hacking the radio...
Reduced audio distortion... In addition to my previous post regarding the change in use of R3, change R2 from 1K to 2.7K... Frequency coverage and dial mapping... Increase L1 from 37 turns to 51 turns...Remove C8...This centers the frequency coverage and makes the dial tracking spot on... Overall Performance... The audio is now crystal clear...Tuning is sharper...The change to L1 may not be necessary or important to you...It is offered as an option to you...The change to R2 is critical, in my opinion...Your mileage may vary and these mods are made at your own peril, but are not hazardous... The Murania radio is an outstanding kit and highly recommended...Please email me with any questions...73 Jim WB2LHP in MI
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Re: No hiss from speaker
cornhusker
toggle quoted messageShow quoted text
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Re: No hiss from speaker
WA0ITP
FB will do and tnx agn
toggle quoted messageShow quoted text
72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com On 7/13/2018 4:05 PM, Paul Smith wrote:
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Re: No hiss from speaker
Paul Smith
Hello Terry, I am intrested to find out what my Murania will pick up in ur neck of the woods. I have only messed abt with it in the daytime and between 12 es 14 it is blanked by the stations in Chanute and Iola each 10 miles away. Let me know how it does. it might just be there tomorrow de Paul N0NBD
Sent from Outlook
From: MuraniaKit@4SQRP.groups.io <MuraniaKit@4SQRP.groups.io> on behalf of WA0ITP <wa0itp@...>
Sent: Friday, July 13, 2018 5:27 PM To: MuraniaKit@4SQRP.groups.io Subject: Re: [MuraniaKit] No hiss from speaker GA
Paul,
Good going Paul. Can you receive WHO 1040, or WMT 600 ? It will be good to have your rcvr as a demo unit for the upcoming Expo. 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com On 7/13/2018 10:21 AM, Paul Cartwright wrote:
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Re: No hiss from speaker
WA0ITP
Sri abt the screenshot. I have no idea how it got pasted in the
email. Another cyber mystery to me.
toggle quoted messageShow quoted text
72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com On 7/13/2018 12:27 PM, WA0ITP wrote:
GA Paul,
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Re: No hiss from speaker
WA0ITP
GA Paul,
toggle quoted messageShow quoted text
Good going Paul. Can you receive WHO 1040, or WMT 600 ? It will be good to have your rcvr as a demo unit for the upcoming Expo. 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com
On 7/13/2018 10:21 AM, Paul Cartwright
wrote:
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Re: No hiss from speaker
Paul Cartwright
Thanks for the reply Johnny. I did go ahead and finish it last night. It worked perfectly even though I did not get the hiss like the manual said. Interestingly, I had put the continuity tester across the primary coil of the transformer and heard a hiss from the speaker. So, I knew that the transformer through the speaker was wired correctly. Paul WA0PAC
On Fri, Jul 13, 2018 at 6:37 AM, Johnny Matlock <jomatlock@...> wrote:
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Re: No hiss from speaker
Gm Paul I built mine a few weeks ago And that was my outcome as well. Dave advised me to go ahead with the build. I did all everything was fine. I think we may need to update the manual. 72 Johnny AC0BQ
On Thu, Jul 12, 2018 at 10:50 PM Paul Cartwright <paul@...> wrote:
--
Check out the 4SQRP website at 4sqrp.com
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No hiss from speaker
Paul Cartwright
I have finished the audio amplifier portion of the build. I am not able to hear any hiss from the speaker while following the test instructions. The power circuit tested at 1.7 volts. I have double checked the components and connections, including comparing my circuit with the photos on the website. Everything looks correct. Any ideas on how to troubleshoot this problem? Paul Cartwright WA0PAC
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Independence from Boredom!
Good afternoon all: Hope you are having a Safe and Happy Independence Day! 🇺🇸 I am pleased to announce the latest kit from the 4 sqrp Group. Talk to anyone who was around during the Sputnik era and he will tell you how exciting it was when the first transistor radios were introduced. For the first time, you could have a portable radio that could slip into your pocket, and affordable enough that young people could take their music with them anywhere. The Four-State QRP Group has brought back the thrill of those days gone by with the Murania receiver! Designed by David Cripe NM0S, this simple kit is the perfect starter project to get young people interested in our hobby or to bring back those warm memories gained listening to your first portable radio.
Find more information at http://4sqrp.com/Murania.php
4SQRP is an IRS-recognized 509(a)(2) Public Charity for Scientific Purposes. All proceeds from kit sales go towards the production of our annual OzarkCon information-sharing and education conference held in early April each year. -------------------------------- Thanks 72, 73 Johnny AC0BQ 🇺🇸 Check out the 4SQRP website at 4sqrp.com
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Test from ITP
WA0ITP
just a test
-- 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com
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Re: Here is my finished Murania
Yes, I did and the print was so small I only recognized things like C2, etc. I normally would not have even thought of that when checking the parts with the BOM. This AM I put my lighted loupe on and could finally recognize the ID that identifies with each cap. It would be very helpful to others to have the 103, 47, etc., that is on each cap placed in the line of those parts on the bill of materials. It has been on previous kits. It was just trying to figure out what was which and I have been using caps and cap equivalent charts, cap meters, for years. I had to stop and think more. If I had been in Indiana at my grand kids home I might have not been able to figure it out without all my "helps". Hi! But, there is a young ham next door to the grand son and he is always willing to help. There is hope that out of my six grand kids one will become a ham. That's not the best odds..... When I was a kid half the kids on the block aspired to ham radio even though only a few of us made it with the help of our scout master. May he forever rest in peace.... What a guy. Thanks. Dave K8WPE
On Jun 29, 2018, at 9:33 AM, Paul Smith <n0nbd@...> wrote:
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Re: Here is my finished Murania
Paul Smith
Dave, If you check the Pittsburg side of the front panel where the speaker goes is the parts list with designators de Paul N0NBD
Sent from Outlook
From: MuraniaKit@4SQRP.groups.io <MuraniaKit@4SQRP.groups.io> on behalf of David Wilcox via Groups.Io <Djwilcox01@...>
Sent: Friday, June 29, 2018 9:17 AM To: MuraniaKit@4SQRP.groups.io Subject: Re: [MuraniaKit] Here is my finished Murania I bought my kit at FDIM. Did a parts check last night and all the parts are there. Am waiting for grand sons next visit to build it. What a cute radio. May have to build this one for me and order ankther one for him. Ha!
It would be helpful to include in the instructions which caps are which, ie., 103, 224, 47, etc. I did check them with a cap checker. The directions only show the values of the caps but not the designators on each cap. The caps checked out but some
were not close to the listed values so that could be very confusing to a noobie. I know bypass caps can vary a lot and still work.
Dave K8WPE
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Re: Here is my finished Murania
I bought my kit at FDIM. Did a parts check last night and all the parts are there. Am waiting for grand sons next visit to build it. What a cute radio. May have to build this one for me and order ankther one for him. Ha! It would be helpful to include in the instructions which caps are which, ie., 103, 224, 47, etc. I did check them with a cap checker. The directions only show the values of the caps but not the designators on each cap. The caps checked out but some were not close to the listed values so that could be very confusing to a noobie. I know bypass caps can vary a lot and still work. Dave K8WPE
On Jun 28, 2018, at 4:44 PM, Paul Smith <n0nbd@...> wrote:
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Here is my finished Murania
Paul Smith
I am listening to our local AM station as I write this. My Murania is one of the Beta build units. It works great. The build was simple as can be and I feel like the kid 60 years ago with my first transistor radio. I am the kitter on this kit and have a BIG bunch bagged up and ready to go to the PO. Watch the reflector and web page for the release. Rumor has it to be released JULY 4. You, your kids and grand kids will love this radio and the time spent spent building it.
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