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Re: ubitx and case for sale
Timothy Fidler
FET 2N4091 metal case JFET or equivalent. Must be metal case for freq stab.? Bipolars : MPSH 10 or better use? the? BSX-20 which has a FT of 500 Mhz and very low input capacitance c/w 2n2222.? and get rid of the silly 9v regulator chain use an LM 78L09 regulator chip or similar. TEF
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Re: Accidental Calibrate
#ubitx
#calibration
My QTH is the east coast of Ireland, so will be very lucky to receive the 5, 10Mhz WWV?transmissions, for Zero Beat calibration, given the propagation conditions lately.
I'll have to tune to a local AM broadcast channel. Thanks for the suggestion anyway. |
Re: ubitx and case for sale
Timothy Fidler
I am not interested in purchase but if you do sell and want to stay in the hobby , without much more money you could buy a CS? SSB transceiver from?
He has an agent in Nth America.? Unless he forces you to go direct to the US agent? then you can purchase at USD 120, 10 shipping and about $25 assly charge as I am guessing you would not be willing to assemble and test because of risk of it not working and then your getting stuck.? ?THIS is a MONO band transmitter and it is blind. you know you are in band because it it DDS controlled , ie a local oscillator from a quartz time based? but unless you build yourself a marker generator you don't know where exactly you are (you can however put a calibration cheat around the dial). These use a generic IRF 530 Mosfet as the final? so if the final blows you can replace it for around $1.50 or so. It is theoretically possible to convert this transceiver so it can do CW as well though it would give the internal relays a? bit of a hammering. You may never want CW.? ?The other option is another monobander from OzQRP? which is Run by Leon in Canberra area.? He sells a sort of Bitx .. all anlogue and you can either make your own VFO or use his CVS I think he calls it.. which sells for USD 45 equivalent and is a very slick looking unit with a multiline illuminated pixel display doodad.? If you want to roll your own VFO you can use one of? A Farhan's designs .. I will attach a rather sleek one .. you can get the FET from either Rockby electronics in Melbourne? or from Dan's kits and parts in Mo in US.? There are several sources for air variables NOS on the web INcluding ONe I saw in the US for less than $10. Contact me directly for details. What you could do is set yourself the target of getting a VFO going and if that fails go for a? built up transceiver and if you pass then you can buy either? of the above transceivers as a kit...with the OzQRP unit you already have an agricultural VFO going and you need only buy the base transmitter kit sans vfo.? Eventually you will get fed up with the analogue vfo and will buy the CVS and integrate that in? your box. The Farhan design shown needs to be rejigged to tune 2.8 to 3 Mhz so it produces 7 to 7.2 Mhz when subtracted from the IF frequency of 10 Mhz that Ozqrp use. If you treated your tecnician licence study seriously you can do those calcs. It really needs the coil rebuilt as a T50-6 toroid. You can most likely get one of those as a one off from Fred at Far circuits, or you can get it and a few other toroids and semis as a bunch from? the Toroid King in Florida.? The Farhan schematic has a few idiocies. Firstly there is a resistor with a missing value. Anything from 50 to 100 R will work . THere is an electrolytic wit no value , use 10uF and the tapping point on the coil is not show, use 1/3 turns up from the grounded end.? If you are to do any experimentation at all you will need a frequency counter and I have just heard of one that? as? bare unit sounds plausible. 6 digits? eg 14 020 1 Mhz ie down to the 100s of hertz resolution $ 13 USD. Obviously ex PRC.? It will be an extension of the Wolf Buscher design. ..almost for sure.? have a look at ? ? ?site and good luck with what you try to do. Subs. BFW11 Unavailable . Use 2N xxxx I am dead tired and might muck up and lose this post so contract me direct for trans and FET subs if you are going lto built the VFO. |
Re: Ubitx will be here tomorrow. Any suggestions for a Bitx newbie
#ubitx
Don't do the Tune Up Calibration unless you absolutely have to.
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BITX QSO Afternoon/Evening, Sunday, August 5, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
John P
BITX QSO Afternoon/Evening, Sunday, August 5, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
Join us as we make contacts with our BitX-40s or uBitXs or anything else on 7.277 MHz in 40 meters! This is a worldwide event for BitX40 (and other QRP)?stations starting at 3PM and 7pm in each time zone. To participate, call CQ BitX on Sunday, starting at?3PM and/or 7PM?your local time. The BitX QSO Night continues through the evening and conditions usually improve after sunset, so it is worthwhile to participate later in the evening. Suggested Best Operating Practices: Work at QRP power levels unless conditions require more power. Report your QSO's, discuss propagation, noise, signal reports, audio reports, antenna type, etc. in this thread. This is an undirected, scheduled event.? The BITX QSO Night relies on you to call CQ BITX to initiate contacts with other stations, so warm up that final and transmit a few calls on Sunday evening.? Talk to you then! |
Re: Off Topic: Gap Antennas
On Thu, Aug 02, 2018 at 12:25:45PM +0100, Alan de G1FXB via Groups.Io wrote:
There are reports from 3 different EU countries that the site doesn'tIf you whois gapantenna.com you'll find they have 3 nameservers set up Name Server: NS1.VEROSOFT.COM Name Server: NS1.KEYMANAGED.COM Name Server: NS2.VEROSOFT.COM DNSSEC: unsigned ns1.verosoft.com. 3338 IN A 199.189.195.10 ns1.keymanaged.com. 10469 IN A 50.253.178.50 ns2.verosoft.com. 3307 IN A 199.189.195.11 ping ns1.keymanaged.com PING ns1.keymanaged.com (50.253.178.50): 56 data bytes It's dead Jim. Fortunately the other two nameservers work gapantenna.com. 1922 IN A 199.189.195.12 My advice (unless you are comfy with making temporary local host changes) is to restart the browser and hope it catches one of the two working NS Who wants to try the site from elsewhere, Australasia?Diane -- - db@... db@... |
Re: Off Topic: Gap Antennas
¿ªÔÆÌåÓýThere are reports from 3 different EU countries that the site doesn't resolve there.Using a VPN to provide a point of presence within the US does..... This would indicate it's the source site not the destination(s) that is experiencing difficulties, else there are EU DNS sanctions being applied? :-P Who wants to try the site from elsewhere, Australasia? Alan On 02/08/2018 11:32, Karl Heinz Kremer,
K5KHK wrote:
One thing you can try is to change your DNS server configuration. You are very likely using your orovider¡¯s DNS servers. You can change that to e.g. OpenDNS or Google: |
Re: Volume with switch
Ian Reeve
¿ªÔÆÌåÓýHi Eddie, ? Pics of led wiring and switched pot I did not use the supplied one as the knob did not fit the spindle but have shown the one as supplied being held. Wiring looking at the back of the pot: ? Top three terminals? Left?? green (earth)? Middle orange (feed to audio amp) Right yellow audio in to audio section. These are the colours used as shown on the instruction wiring sheets.On mine,the connections come from the small pcb supplied and so might confuse. The two terminals at the back on theblack moulding are the switch and on mine I wired them across the push button on the rear panel which remains in the OFF position,the switch on the pot now switches the rig. ? On mine you will see on the switched pot:? left screen (bare) earth Centre (red) feed to audio amp Right (white) audio in from receiver section for audio amp. ? The two thicker wires wrapped? ?(red and orange) are the ON/OFF switch terminals on my pot. ? The LED connecting three wires as shown in the earlier email,are connected to the led as follows: ? In my case white,blue and red ? White goes to centre pin of led (earth) The other two go to the remaining pins via current limiting resistors On mine I used 1.6K ohms but that value might need increasing as the led is rather bright. ? Temporarily wire in the led and when the rig is switched on to receive you want the led green to be on ( in my case the led flat side is the red wire,the round side is the blue wire) to be on in receive. So if you use my colours and wire as described,it should be green (rx) and red(tx) ? Any problems,contact me directly if you wish on ian.radioworkshop@... ? 73 ? Ian M0IDR ? Sent from for Windows 10 ? From: Ian Reeve
Sent: 02 August 2018 10:03 To: [email protected]; ee@... Subject: Re: [BITX20] Volume with switch ? Dear Eddie, ? Here are some pics to help you: ? Wiring of tx/rx led connections to board Wiring of USB rear connector- a mini usb plug is inserted into the socket on the Arduino and then wired as shown to the USB socket on the rear panel. Alternatively a USB mini to standard USB lead could be used and left loose out of the back of the case. ? Re the switched pot, please see pictures on my separate email to you ? 73 ? Ian M0IDR ? ? Sent from for Windows 10 ? From: [email protected] <[email protected]> on behalf of Ian Reeve <ian.radioworkshop@...> ? Hi Eddie, ? I just am waiting for my phone to charge up and I will send you a pic of the led wiring and the volume pot wiring. ? 73 ? Ian Ian.radioworkshop@... ? ? ? Sent from for Windows 10 ? From: [email protected] <[email protected]> on behalf of Eddie Esserman <ee@...> ? Anyone got a drawing or picture of the switch on the pot? ? |
Re: hacking bitx40 for 20 metre
#bitx40
Terry,
The latest Raduino sketch v1.28 provides this feature: Prevention of out-of-band transmissionsThe software restricts transmission to the 40m ham band allocation. By default this is ITU region 2 (Americas: 7000-7300 kHz). If you are located in a different ITU region, uncomment ONE of the lines 44-47 depending on your location, and recompile. If the is installed, out-of-band TX will be disabled, but RX is still possible outside the band. If the is NOT installed, both TX as well as RX will be disabled outside the band. Download it from 73 Allard PE1NWL |
Re: Volume with switch
Ian Reeve
¿ªÔÆÌåÓýDear Eddie, ? Here are some pics to help you: ? Wiring of tx/rx led connections to board Wiring of USB rear connector- a mini usb plug is inserted into the socket on the Arduino and then wired as shown to the USB socket on the rear panel. Alternatively a USB mini to standard USB lead could be used and left loose out of the back of the case. ? Re the switched pot, please see pictures on my separate email to you ? 73 ? Ian M0IDR ? ? Sent from for Windows 10 ? From: [email protected] <[email protected]> on behalf of Ian Reeve <ian.radioworkshop@...>
Sent: Thursday, August 2, 2018 9:07:50 AM To: [email protected] Subject: Re: [BITX20] Volume with switch ?
Hi Eddie, ? I just am waiting for my phone to charge up and I will send you a pic of the led wiring and the volume pot wiring. ? 73 ? Ian Ian.radioworkshop@... ? ? ? Sent from for Windows 10 ? From: [email protected] <[email protected]> on behalf of Eddie Esserman <ee@...>
Sent: Thursday, August 2, 2018 3:22:32 AM To: [email protected] Subject: [BITX20] Volume with switch ?
Anyone got a drawing or picture of the switch on the pot?
thanks. Eddie |
Re: hacking bitx40 for 20 metre
#bitx40
just a bit more about my hacking requirements
what i would really like is a general coverage receiver (like the ubitx) but leave the tx to 40 m only presumably this means a hack to the rx input filter and a hack to the sketch any ideas |
Re: Volume with switch
Ian Reeve
¿ªÔÆÌåÓýHi Eddie, ? I just am waiting for my phone to charge up and I will send you a pic of the led wiring and the volume pot wiring. ? 73 ? Ian Ian.radioworkshop@... ? ? ? Sent from for Windows 10 ? From: [email protected] <[email protected]> on behalf of Eddie Esserman <ee@...>
Sent: Thursday, August 2, 2018 3:22:32 AM To: [email protected] Subject: [BITX20] Volume with switch ?
Anyone got a drawing or picture of the switch on the pot?
thanks. Eddie |
Re: ND6T AGC and Click kit wiring notes
Timothy Fidler
Bob I know these are non components boards? but I suspect they use the 7822 audio amp. THere was a bleat that some? Chino TDAs were failing. If so I know of two sources for NOS? replacements one out of Oz and one in USA. .. ad we are not talking crusty old Dan in Montana. Email? TEF if this is the case.
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Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 CB #2885,?
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Re: ND6T AGC and Click kit wiring notes
please send parts for 2 bds as I find 1 bd from someone and I still will take your 2 kits wish all was from you so to work th yu Alan -----Original Message----- |
Re: End Fed antennas w/ uBITX
#ubitx
Timothy Fidler
all the better for TEF .. my treasure chest.?
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Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 CB #2885,?
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