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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+DK7FC\s+VLF\s+probe\s*$/: 5 ]

Total 5 documents matching your query.

1. LF: DK7FC VLF probe (score: 1)
Author:
Date: Fri, 8 May 2015 22:14:16 -0230 (NDT)
Hi Stefan and group, I am building a probe using your design. Could you explain the interstage network and the 470 uH choke? I hope to use this to detect some 36 km photons. So far, using the PA0RDT
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00040.html (9,249 bytes)

2. Re: LF: DK7FC VLF probe (score: 1)
Author: DK7FC <>
Date: Sat, 09 May 2015 14:22:57 +0200
Hi Joe, That choke was just intended to improve the supply voltage stability (low pass filtering). It's value is not critical. Meanwhile i've learned that it can be helpful to spend a ferrite bead in
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00042.html (11,137 bytes)

3. Re: LF: DK7FC VLF probe (score: 1)
Author:
Date: Sat, 9 May 2015 10:40:54 -0230 (NDT)
Stefan, Thanks for the info and advice. Yes, ferrite beads sound like a good idea. The resistors and caps (1M 100k 68pF 680pF etc) between the FET's are for lowpass or something else? 73 Joe VO1NA Hi
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00044.html (10,797 bytes)

4. Re: LF: DK7FC VLF probe (score: 1)
Author: DK7FC <>
Date: Sat, 09 May 2015 15:17:17 +0200
Am 09.05.2015 15:10, schrieb : [...]The resistors and caps (1M 100k 68pF 680pF etc) between the FET's are for lowpass or something else? R, cfm. 73, Stefan
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00045.html (10,779 bytes)

5. Re: LF: DK7FC VLF probe (score: 1)
Author:
Date: Sat, 9 May 2015 10:57:25 -0230 (NDT)
Thanks Stefan, I'll post a progress report soon. Tomorrow a 10k race! 73 Joe Am 09.05.2015 15:10, schrieb : [...]The resistors and caps (1M 100k 68pF 680pF etc) between the FET's are for
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00046.html (10,207 bytes)


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