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Re: Bitx 20 help
#w8tee
Vince Vielhaber
I look on ebay and don't have a lot of luck with that. Hopefully someone
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else will have a good source. Vince - KA8CSH How can I get a good gt37-43, could you help me with this? --
Michigan VHF Corp. |
Re: Constant volume/AGC
Lots more info and articles here!
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In the last 40+ years I have tried photodiode, fet, ldr and even the NE570. I still have one of my variable DBX units! At 01/06/2017, you wrote:
From NUTS and VOLTS |
Re: Bitx 20 help
#w8tee
Thanks Bill Meara, lm386 I will check, I live in turkey, t50-2 I use thyroid, 73
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Re: Bitx 20 help
#w8tee
Your BITX 20 board looks very nice.?? If you are hearing a whistling sound on receive, your audio amplifier might be oscillating.? Check the grounding on the LM386.? One other thing I notice from the photo:? I like your toroidal coils and I often use insulated wire as you have done.? But you wound the coils on red T-50-2 cores.?? I think you need ferrite cores that will result in higher inductance.? Type 43 material is usually used.?? If you need some, I can send some to you (Farhan gave me a bunch of these).? Let me know.?? (Where are you?0 Don't give up!? You are close to getting a wonderful rig on the air. 73? Bill N2CQR On Thursday, June 1, 2017 6:10 AM, huseyin.guner via Groups.Io <huseyin.guner@...> wrote: Hi, I decided to do Bitx20, I use 10 MHz xtal, card is over and I get energy, whistling, what could be the problem.Nobin was wrapped with 8 rounds t50-2 |
Bitx 20 help
#w8tee
Hi, I decided to do Bitx20, I use 10 MHz xtal, card is over and I get energy, whistling, what could be the problem.Nobin was wrapped with 8 rounds t50-2
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Re: Constant volume/AGC
Weddig, Henning-Christof
complete link:
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----- Original Message -----
From: "Allard PE1NWL" <pe1nwl@...> To: [email protected] Sent: Thursday, 1 June, 2017 11:06:17 Subject: Re: [BITX20] Constant volume/AGC that link seems to be broken... On Thu, June 1, 2017 10:58, Henning Weddig via Groups.Io wrote: please have a loog on |
Re: Constant volume/AGC
Weddig, Henning-Christof
I copied this link from Google, after inserting qex Audio agc
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the full article is named: synthesing an Audio AGC circuit Phil Andedrson W0XI published in the QEX Sept Oct 2010 Henning ----- Original Message -----
From: "Allard PE1NWL" <pe1nwl@...> To: [email protected] Sent: Thursday, 1 June, 2017 11:06:17 Subject: Re: [BITX20] Constant volume/AGC that link seems to be broken... On Thu, June 1, 2017 10:58, Henning Weddig via Groups.Io wrote: please have a loog on |
Re: Constant volume/AGC
that link seems to be broken...
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On Thu, June 1, 2017 10:58, Henning Weddig via Groups.Io wrote:
please have a loog on |
Re: Constant volume/AGC
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Re: Foreign orders
#w8tee
Another easy way out, we investigated it for BITX boards as well, is to use fulfillment by amazon (FBA for amazon citizens). - f On Thu, Jun 1, 2017 at 4:07 AM, William R Maxwell <wrmaxwell@...> wrote:
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Re: Constant volume/AGC
this can be done much easier with a 2N7000 as it doesn't need -ve bias of the JFET. I don't know if you have seen the AGC circuit in the BITX hacks - f |
Re: W8TEE TFT/VFO Board from FDIM talk
Hi Kevin
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I find that most stuff arrives within 10-15 days 73 de Charlie GI4FUE -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Kevin Gilot Sent: 01 June 2017 00:48 To: [email protected] Subject: Re: [BITX20] W8TEE TFT/VFO Board from FDIM talk Hi Charlie, What was the shipping time to get your stuff? I don't really want to wait a month or more. Thanks and 73, Kevin NZ1I Mystic, CT Sent from my iPhone --- This email has been checked for viruses by AVG. |
Re: Conflicting information
¿ªÔÆÌåÓýNot the same as the as the 328. There is no 12 volt connector on the Raduino processor. There is on the R3 or 2560. The information you supplied refers to them. The 328 is powered from the 5 volt regulator on the Raduino board OR the USB connection. No automatic selection exists on? the Raduino. ? v/r Fred W4JLE ? From: [email protected] [mailto:[email protected]] On Behalf Of John Smith via Groups.Io ? Let's see if I can help. The Arduino site says this.- Power The Arduino/Genuino Uno board can be powered via the USB connection or with an external power supply. The power source is selected automatically. External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the GND and Vin pin headers of the POWER connector. The board can operate on an external supply from 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts. |
Bitx 20 help
#bitx20help
Hi, I decided to do Bitx20, I use 10 MHz xtal, card is over and I get energy, whistling, what could be the problem. Nobin was wrapped with 8 rounds t50-2, thank you.
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