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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Automatic\s+variometer\s+circuit\s*$/: 13 ]

Total 13 documents matching your query.

1. Re: LF: Automatic variometer circuit (score: 1): Author: DK7FC <[email protected]>; Date: Thu, 29 Oct 2015 22:09:51 +0100; Hi Chris, Am 29.10.2015 21:26, schrieb Chris Wilson: [...] albeit my loading coil needs manual tweaking to move to the right part of the band. Not sure of the best way to remote tune it, it would be; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00449.html (12,465 bytes)
2. Re[2]: LF: Automatic variometer circuit (score: 1): Author: Chris Wilson <[email protected]>; Date: Fri, 30 Oct 2015 11:27:19 +0000; Hello Stefan, Thursday, October 29, 2015 Now that looks interesting! Could I just ask what sort of current the motor draws? And what sort of RPM it turns at and the gearing used, to give me a guide a; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00463.html (13,001 bytes)
3. Re: LF: Automatic variometer circuit (score: 1): Author: Andy Talbot <[email protected]>; Date: Fri, 30 Oct 2015 19:20:05 +0000; Can I warn against one feature shown in the circuit diagram The two 10uF electrolytics connected from the output of the first opamp to the supply rails should not be there. They cause instability; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00479.html (13,995 bytes)
4. Re: LF: Automatic variometer circuit (score: 1): Author: DK7FC <[email protected]>; Date: Fri, 30 Oct 2015 20:37:28 +0100; Hi Chris, My motor draws about 200 mA at 12V. It has about 1 round per 3 seconds i estimate. Costs are below 10 EUR. You will find something on ebay for example. I use end-switches in the constructio; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00481.html (14,503 bytes)
5. Re: LF: Automatic variometer circuit (score: 1): Author: "Markus Vester" <[email protected]>; Date: Fri, 30 Oct 2015 21:43:54 +0100; prevent the wind-up of the cable, antenna wire, coax , transmitter, key, operator,... take care ;-) 73, Markus From: DK7FC Sent: Friday, October 30, 2015 8:37 PM To: [email protected] rsg; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00484.html (13,015 bytes)
6. Re[2]: LF: Automatic variometer circuit (score: 1): Author: Chris Wilson <[email protected]>; Date: Sat, 31 Oct 2015 13:20:06 +0000; Hello Stefan, Friday, October 30, 2015 Thanks for the detailed info, and thanks to Andy `GNT for the info re the caps. I will order the I/C's for this circuit, and I have ordered a 2 RPM reduction dr; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00497.html (11,870 bytes)
7. Re[4]: LF: Automatic variometer circuit (score: 1): Author: Chris Wilson <[email protected]>; Date: Sat, 31 Oct 2015 17:00:25 +0000; Hello Andy, Saturday, October 31, 2015 Is this what you mean? http://www.chriswilson.tv/phase-driver.jpg Thanks. -- Best regards, Chris mailto:[email protected]; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00501.html (12,034 bytes)
8. Re: LF: Automatic variometer circuit (score: 1): Author: "Graham" <[email protected]>; Date: Sat, 31 Oct 2015 18:26:19 +0100; Its a Bi phase DC clamp , the amp has no gain as the inv is linked to the o/p which is ground , the cap's probably provide a little transcendental compliance G, From: Andy Talbot Sent: Friday, Octobe; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00504.html (15,166 bytes)
9. Re: LF: Automatic variometer circuit (score: 1): Author: DK7FC <[email protected]>; Date: Sat, 31 Oct 2015 19:43:42 +0100; Hi Chris, Oh, this might be a bit to early. I bet there will be given further instructions to you (you know, all good things are 3). Be aware of circuits or even software coming from Germany :-) Actu; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00509.html (11,511 bytes)
10. Re: LF: Automatic variometer circuit (score: 1): Author: DK7FC <[email protected]>; Date: Sat, 31 Oct 2015 19:47:33 +0100; Typo. I meant: Beware of circuits... 73 Am 31.10.2015 19:43, schrieb DK7FC: Be aware of circuits...; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00510.html (10,705 bytes)
11. Re[2]: LF: Automatic variometer circuit (score: 1): Author: Chris Wilson <[email protected]>; Date: Fri, 20 Nov 2015 22:36:57 +0000; Hello DK7FC, Thursday, October 29, 2015 I have breadboarded the motor drive circuit and tested it with 2 one and a half volt cells centre tapped and 1k pot to simulate the phase change input. The dri; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00486.html (11,979 bytes)
12. Re: LF: Automatic variometer circuit (score: 1): Author: DK7FC <[email protected]>; Date: Sat, 21 Nov 2015 19:49:40 +0100; Hi Chris, I took a separate floating power supply to build this circuit, a simple transformer (10VA), a bridge rectifier, electrolyt capacitors, voltage regulators, you know, the traditional stuff :-; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00493.html (13,630 bytes)
13. Re[2]: LF: Automatic variometer circuit (score: 1): Author: Chris Wilson <[email protected]>; Date: Sat, 21 Nov 2015 20:55:34 +0000; Hello DK7FC, Saturday, November 21, 2015 I'll run it off a separate supply then, thanks Stefan, or maybe off an accumulator, I have loads of lightweight race car gel batteries that get changed solely; /rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00495.html (10,865 bytes)

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