Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Adjusting\s+fil\s+voltage\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Adjusting\s+fil\s+voltage\s*$/: 10 ]

Total 10 documents matching your query.

1. [AMPS] Adjusting fil voltage (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Tue, 19 Jan 1999 13:25:26 -0600; This is a multi-part message in MIME format. --=_NextPart_000_0011_01BE43AF.2D082980 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Measures, Orr, et al ha; /archives//html/Amps/1999-01/msg00268.html (11,485 bytes)
2. [AMPS] Adjusting fil voltage (score: 1): Author: RFpower@radiodan.com (Radiodan W7RF); Date: Tue, 19 Jan 1999 15:56:30 -0800; This is a multi-part message in MIME format. --=_NextPart_000_0031_01BE43C4.475A3DE0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit Simple yet so valuable, this info; /archives//html/Amps/1999-01/msg00269.html (16,889 bytes)
3. [AMPS] Adjusting fil voltage (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 20 Jan 1999 00:34:09 -0800; ? When the amplifier has a combination hv / fil. transformer, like the SB-200 and 2KD-5, such resistors must go in series with the fil. sec. winding. ? The reported filament inrush current in the He; /archives//html/Amps/1999-01/msg00272.html (9,086 bytes)
4. [AMPS] Adjusting fil voltage (score: 1): Author: pmarkham@newsguy.com (pmarkham); Date: Wed, 20 Jan 1999 08:24:07 -0500; ? This is the right way to adj. the fil. potential for a thoriated tungsten cathode. One really doesn't need an accurate fil. voltmeter. Howeven, this method can destroy heater/oxide-cathode type tu; /archives//html/Amps/1999-01/msg00274.html (8,111 bytes)
5. [AMPS] Adjusting fil voltage (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 20 Jan 1999 14:21:21 +0000; Normally the rheostat will be set wherever it was last time (unless somebody has been messing with it). If the resistance is large enough, it wouldn't need any more inrush protection. I'm using a 100; /archives//html/Amps/1999-01/msg00278.html (8,814 bytes)
6. [AMPS] Adjusting fil voltage (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 20 Jan 1999 12:46:46 -0800; ? By the application of too low a heater potential - which can result in separation of the barium-strontium oxide layer from the cathode. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/me; /archives//html/Amps/1999-01/msg00284.html (8,321 bytes)
7. [AMPS] Adjusting fil voltage (score: 1): Author: RFpower@radiodan.com (Radiodan W7RF); Date: Wed, 20 Jan 1999 13:02:30 -0800; Rich responed to Dan...... Yes, of course. I was thinking of separate transformers. Yes, I did. I think I use a 10 ohm 25 watt in each leg of the primary. Further dusting off of my brain reveals this; /archives//html/Amps/1999-01/msg00286.html (10,768 bytes)
8. [AMPS] Adjusting fil voltage (score: 1): Author: wb8jkr@juno.com (Mark S Graalman); Date: Wed, 20 Jan 1999 16:12:09 EST; If current is drawn from the cathode when the filament voltage is too low it will strip the cathode. Mark WB8JKR On Wed, 20 Jan 1999 08:24:07 -0500 "pmarkham" <pmarkham@newsguy.com> writes: _________; /archives//html/Amps/1999-01/msg00287.html (9,330 bytes)
9. [AMPS] Adjusting fil voltage (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 20 Jan 1999 15:21:14 -0600; I understand the scientific name for that is "ionic bombardment." It occurs under saturation conditions, when the electron cloud no longer exists to protect the cath from positive ions. (?) K6XK --Or; /archives//html/Amps/1999-01/msg00288.html (10,534 bytes)
10. [AMPS] Adjusting fil voltage (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 20 Jan 1999 15:11:07 -0800; ? R, R ? only the min. specified heater potential. ? And if the mains V was low and the rheostat were set for 0-ohms? ? The formula is (e2/e1)^23.4. Using the 2-500Z: (5.25v/4.75v)^23.4 = 1.105^23.4; /archives//html/Amps/1999-01/msg00290.html (11,051 bytes)

Current List: 1 - 10
Page: [1]