top band ubitx

crofter All Messages By This Member #39189 hi is it possible to add a extra filter board for top band? will it be possible to get a extra control line from the processor to control the top band filter thanks chris
chris gress #39190 Yep it would be nice to have top band on it? toggle quoted message Show quoted text On 14 Jan 2018 15:41, <leefamily.44@...> wrote: hi is it possible to add a extra filter board for top band? will it be possible to get a extra control line from the processor to control the top band filter thanks chris
M Garza #39191 Pin A7 is unused.? You could modify the sketch to engage the relay and allow the tuning down to the 160m band. Marco - KG5PRT? toggle quoted message Show quoted text On Jan 14, 2018 9:50 AM, "chris gress" <Chrisg0wfh@...> wrote: Yep it would be nice to have top band on it? On 14 Jan 2018 15:41, <leefamily.44@...> wrote: hi is it possible to add a extra filter board for top band? will it be possible to get a extra control line from the processor to control the top band filter thanks chris
crofter All Messages By This Member #39192 thanks for the replies? i am not shure what software this would need would it be possible to do in a upgrade? the filter could be a extra board with realys thanks chris
Mike All Messages By This Member #39193 I use my UBitx on 160 by making an external low pass and hooking it to the antenna out. Mike WA3O
Michael VE3WMB Member Profile All Messages By This Member #39194 .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
bill richardson All Messages By This Member #39197 开云体育 This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters Sent from my iPhone toggle quoted message Show quoted text On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
K9HZ All Messages By This Member #39198 开云体育 Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? toggle quoted message Show quoted text On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> Sent from my iPhone On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
Art N2AJO All Messages By This Member #39199 开云体育 Bill What are you using to connect the filter to the antenna connector on the back of the rig Art - N2AJO? Sent from my iPhone toggle quoted message Show quoted text On Jan 14, 2018, at 1:12 PM, K9HZ <bill@...> wrote: Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> Sent from my iPhone On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
bill richardson All Messages By This Member #39201 开云体育 I got the connector from Amazon Sent from my iPhone toggle quoted message Show quoted text On Jan 14, 2018, at 1:17 PM, Art Olson <olson339@...> wrote: Bill What are you using to connect the filter to the antenna connector on the back of the rig Art - N2AJO? Sent from my iPhone On Jan 14, 2018, at 1:12 PM, K9HZ <bill@...> wrote: Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> Sent from my iPhone On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
Art N2AJO All Messages By This Member #39202 开云体育 Bill Thanks? Art Sent from my iPhone toggle quoted message Show quoted text On Jan 14, 2018, at 1:29 PM, bill richardson <ng1p.bill@...> wrote: I got the connector from Amazon Sent from my iPhone On Jan 14, 2018, at 1:17 PM, Art Olson <olson339@...> wrote: Bill What are you using to connect the filter to the antenna connector on the back of the rig Art - N2AJO? Sent from my iPhone On Jan 14, 2018, at 1:12 PM, K9HZ <bill@...> wrote: Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> Sent from my iPhone On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
bill richardson All Messages By This Member #41347 开云体育 Doing some testing with my uBitx on 160m with a 160m LPF attached to the output. I’m seeing about 15 Watts out but the current draw is running very high at just over 3 amps. So not usable on 160m at the finals will blow I’m sure. The bias stays normal so it’s something else? I wonder what others are seeing? Doing the same test on my Bitx40 on 160m I see about 10 Watts out and the current is about 1.5 amps and very usable. Thanks Bill Ng1p toggle quoted message Show quoted text On Jan 14, 2018, at 1:40 PM, Art Olson <olson339@...> wrote: Bill Thanks? Art On Jan 14, 2018, at 1:29 PM, bill richardson <ng1p.bill@...> wrote: I got the connector from Amazon On Jan 14, 2018, at 1:17 PM, Art Olson <olson339@...> wrote: Bill What are you using to connect the filter to the antenna connector on the back of the rig Art - N2AJO? On Jan 14, 2018, at 1:12 PM, K9HZ <bill@...> wrote: Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
Gordon Gibby #41349 开云体育 Bill, if you’re worried about your finals just turn the drive back a bit. On Feb 6, 2018, at 18:34, bill richardson <ng1p.bill@...> wrote: toggle quoted message Show quoted text Doing some testing with my uBitx on 160m with a 160m LPF attached to the output. I’m seeing about 15 Watts out but the current draw is running very high at just over 3 amps. So not usable on 160m at the finals will blow I’m sure. The bias stays normal so it’s something else? I wonder what others are seeing? Doing the same test on my Bitx40 on 160m I see about 10 Watts out and the current is about 1.5 amps and very usable. Thanks Bill Ng1p On Jan 14, 2018, at 1:40 PM, Art Olson <olson339@...> wrote: Bill Thanks? Art On Jan 14, 2018, at 1:29 PM, bill richardson <ng1p.bill@...> wrote: I got the connector from Amazon On Jan 14, 2018, at 1:17 PM, Art Olson <olson339@...> wrote: Bill What are you using to connect the filter to the antenna connector on the back of the rig Art - N2AJO? On Jan 14, 2018, at 1:12 PM, K9HZ <bill@...> wrote: Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
bill richardson All Messages By This Member #41350 开云体育 Right I could do that and use it just on 160m. So as is I’m seeing about 2 amps on 80m and it goes down as I switch to the higher bands. So going lower from 80m to 160m I jump over an amp to 3.2amps. It’s interesting and just wonder what others are seeing. I don’t see such a jump when looking at my 2 bitx40’s. toggle quoted message Show quoted text On Feb 6, 2018, at 6:38 PM, Gordon Gibby <ggibby@...> wrote: Bill, if you’re worried about your finals just turn the drive back a bit. On Feb 6, 2018, at 18:34, bill richardson <ng1p.bill@...> wrote: Doing some testing with my uBitx on 160m with a 160m LPF attached to the output. I’m seeing about 15 Watts out but the current draw is running very high at just over 3 amps. So not usable on 160m at the finals will blow I’m sure. The bias stays normal so it’s something else? I wonder what others are seeing? Doing the same test on my Bitx40 on 160m I see about 10 Watts out and the current is about 1.5 amps and very usable. Thanks Bill Ng1p On Jan 14, 2018, at 1:40 PM, Art Olson <olson339@...> wrote: Bill Thanks? Art On Jan 14, 2018, at 1:29 PM, bill richardson <ng1p.bill@...> wrote: I got the connector from Amazon On Jan 14, 2018, at 1:17 PM, Art Olson <olson339@...> wrote: Bill What are you using to connect the filter to the antenna connector on the back of the rig Art - N2AJO? On Jan 14, 2018, at 1:12 PM, K9HZ <bill@...> wrote: Very smart. ?External. Then you can change it to whatever band you want at any time.? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: email:??bill@... ? On Jan 14, 2018, at 12:00 PM, bill richardson <ng1p.bill@...> wrote: This is what I did for my bitx40 for use on 80 and 160. Using the Qrp lab filters <image1.jpeg> On Jan 14, 2018, at 12:31 PM, Michael Babineau <mbabineau.ve3wmb@...> wrote: .. and QRP Labs have some very nice and inexpensive LPF kits which includes one for 160m : Cheers Michael VE3WMB
John Backo All Messages By This Member #41351 Bill: I think what you are seeing is the "normal" variation in the output of the MOSFETS. Some are better than others at RF. Gordon's suggestion to turn back the drive is probably the right answer. Alternatively, you could turn down the gate voltage a bit, but that would probably introduce compression distortion. Or you could increase the size of the heat-sink and see how it goes. Probably the wisest thing to do is both turn back the drive a bit and increase the heat-sink. Some, but not all, IRF510's are capable of 20W or more on 80m. you might happen to have some good ones. The key lies in the harmonic generation and the heat-sinking. Note that what you are seeing MAY be from UHF oscillation included in the signal. Be very aware of that. Check your output very carefully. john AD5YE
bill richardson All Messages By This Member #41352 I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening... toggle quoted message Show quoted text On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote: Bill: I think what you are seeing is the "normal" variation in the output of the MOSFETS. Some are better than others at RF. Gordon's suggestion to turn back the drive is probably the right answer. Alternatively, you could turn down the gate voltage a bit, but that would probably introduce compression distortion. Or you could increase the size of the heat-sink and see how it goes. Probably the wisest thing to do is both turn back the drive a bit and increase the heat-sink. Some, but not all, IRF510's are capable of 20W or more on 80m. you might happen to have some good ones. The key lies in the harmonic generation and the heat-sinking. Note that what you are seeing MAY be from UHF oscillation included in the signal. Be very aware of that. Check your output very carefully. john AD5YE
bill richardson All Messages By This Member #41355 Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe. toggle quoted message Show quoted text On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote: I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening... On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote: Bill: I think what you are seeing is the "normal" variation in the output of the MOSFETS. Some are better than others at RF. Gordon's suggestion to turn back the drive is probably the right answer. Alternatively, you could turn down the gate voltage a bit, but that would probably introduce compression distortion. Or you could increase the size of the heat-sink and see how it goes. Probably the wisest thing to do is both turn back the drive a bit and increase the heat-sink. Some, but not all, IRF510's are capable of 20W or more on 80m. you might happen to have some good ones. The key lies in the harmonic generation and the heat-sinking. Note that what you are seeing MAY be from UHF oscillation included in the signal. Be very aware of that. Check your output very carefully. john AD5YE
Vince Vielhaber #41358 What are you using for an antenna? Vince. toggle quoted message Show quoted text On 02/06/2018 08:06 PM, bill richardson wrote: Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe. On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote: I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening... On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote: Bill: I think what you are seeing is the "normal" variation in the output of the MOSFETS. Some are better than others at RF. Gordon's suggestion to turn back the drive is probably the right answer. Alternatively, you could turn down the gate voltage a bit, but that would probably introduce compression distortion. Or you could increase the size of the heat-sink and see how it goes. Probably the wisest thing to do is both turn back the drive a bit and increase the heat-sink. Some, but not all, IRF510's are capable of 20W or more on 80m. you might happen to have some good ones. The key lies in the harmonic generation and the heat-sinking. Note that what you are seeing MAY be from UHF oscillation included in the signal. Be very aware of that. Check your output very carefully. john AD5YE -- Michigan VHF Corp.
bill richardson All Messages By This Member #41363 160m doublet feed with 450 ohm line. toggle quoted message Show quoted text On Feb 6, 2018, at 9:23 PM, Vince Vielhaber <vev@...> wrote: What are you using for an antenna? Vince. On 02/06/2018 08:06 PM, bill richardson wrote: Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe. On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote: I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening... On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote: Bill: I think what you are seeing is the "normal" variation in the output of the MOSFETS. Some are better than others at RF. Gordon's suggestion to turn back the drive is probably the right answer. Alternatively, you could turn down the gate voltage a bit, but that would probably introduce compression distortion. Or you could increase the size of the heat-sink and see how it goes. Probably the wisest thing to do is both turn back the drive a bit and increase the heat-sink. Some, but not all, IRF510's are capable of 20W or more on 80m. you might happen to have some good ones. The key lies in the harmonic generation and the heat-sinking. Note that what you are seeing MAY be from UHF oscillation included in the signal. Be very aware of that. Check your output very carefully. john AD5YE -- Michigan VHF Corp.
bill richardson All Messages By This Member #41959 开云体育 Some more info and pictures for anyone wanting to use the uBitx on 160m.? I’m having a blast on 160m I did add larger heat sinks and a pair of small fans that I can turn on and off as needed to keep the finals cool if I’m long winded or using digital modes. Qrp labs makes a great low pass filter kit: I added a BNC adapter to connect to the LPF to keep it simple.? toggle quoted message Show quoted text On Feb 7, 2018, at 7:22 AM, bill richardson <ng1p.bill@...> wrote: 160m doublet feed with 450 ohm line. On Feb 6, 2018, at 9:23 PM, Vince Vielhaber <vev@...> wrote: What are you using for an antenna? Vince. On 02/06/2018 08:06 PM, bill richardson wrote: Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe. On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote: I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening... On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote: Bill: I think what you are seeing is the "normal" variation in the output of the MOSFETS. Some are better than others at RF. Gordon's suggestion to turn back the drive is probably the right answer. Alternatively, you could turn down the gate voltage a bit, but that would probably introduce compression distortion. Or you could increase the size of the heat-sink and see how it goes. Probably the wisest thing to do is both turn back the drive a bit and increase the heat-sink. Some, but not all, IRF510's are capable of 20W or more on 80m. you might happen to have some good ones. The key lies in the harmonic generation and the heat-sinking. Note that what you are seeing MAY be from UHF oscillation included in the signal. Be very aware of that. Check your output very carefully. john AD5YE -- Michigan VHF Corp. ?? ?? ????????????????????????

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