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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+SB220\s+step\s+start\s+blows\s+fuses\s*$/: 49 ]

Total 49 documents matching your query.

41. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Warren Volz <warren@warrenvolz.com>
Date: Tue, 11 Jul 2017 18:35:19 -0600
Again thank you all for the advice and guidance. Replacement fuses showed up today so I'm being a little more adventurous. As multiple people pointed out the dim bulb tester I have as built won't wor
/archives//html/Amps/2017-07/msg00060.html (10,608 bytes)

42. [Amps] SB220 step start blows fuses (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 11 Jul 2017 22:05:16 -0700
< On a side note, if the step start is done correctly, and step start resistor inserted into one <leg of the 240 vac primary..... or hot leg if wired for 120 vac, you will be able to step start the H
/archives//html/Amps/2017-07/msg00062.html (8,621 bytes)

43. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Warren Volz <warren@warrenvolz.com>
Date: Wed, 12 Jul 2017 00:40:52 -0600
Well I have a major update! The amp shipped with 2 3-500zs that are not full output according to the seller. Since the amp was in shambles I didnt have a way to test them until now. One of the 3-500z
/archives//html/Amps/2017-07/msg00063.html (11,239 bytes)

44. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 12 Jul 2017 21:05:43 -0400
The other tube is an early Eimac that was fragile when removing so the stiffener support of the pins was added. Carl Well I have a major update! The amp shipped with 2 3-500zs that are not full outpu
/archives//html/Amps/2017-07/msg00064.html (12,786 bytes)

45. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 12 Jul 2017 21:12:12 -0400
BTW, running filaments only does nothing except burn 50 watts. The anode needs to run at least at a bright red to degass. When the tube arcs even in the CW position it is usually a hard short but the
/archives//html/Amps/2017-07/msg00065.html (12,667 bytes)

46. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
Date: Sun, 23 Jul 2017 23:23:20 +0200
Sorry for raking up an older topic; I don't always have time to keep up with mail. In the whole discussion, what I did not see is that the power supply of the SB220 is lineair. I have used this to my
/archives//html/Amps/2017-07/msg00090.html (8,954 bytes)

47. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Joe <nss@mwt.net>
Date: Sun, 23 Jul 2017 17:47:42 -0500
On 7/23/2017 4:23 PM, Geert Jan de Groot wrote: Sorry for raking up an older topic; I don't always have time to keep up with mail. {snip} If the thing is wired for 220V, and instead of powering with
/archives//html/Amps/2017-07/msg00091.html (9,362 bytes)

48. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Warren Volz <warren@warrenvolz.com>
Date: Mon, 18 Sep 2017 12:51:28 -0600
Just to close this out, as various people suspected the QSK circuit was broken. I ended up replacing 4 components (Q7, Q6, Q4, U1) on the W7RY QSK board and now the amp is working. I believe that a H
/archives//html/Amps/2017-09/msg00059.html (9,592 bytes)

49. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Mon, 18 Sep 2017 17:44:52 -0500
WOOOO HOO!!! Hard telling what took out all of the semiconductors. Could have been hooked up wrong at one time too. Thanks for letting us know and glad you got it all working! 73 Jim W7RY Just to clo
/archives//html/Amps/2017-09/msg00060.html (10,526 bytes)

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