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Title: Need help with 18Watt Kit...Please Post by: Mule3 on June 04, 2011, 01:22:45 PM Hi,
Got my 18watt kit in 2-3 weeks ago...have been taking my time putting it together making sure everything is right with the layout. Got several questions... I'll post one at a time... Got my power supply from GDS, on it there are two 6.3 volt feeds. One is 3amp and the other is 1 amp. I believe one goes to the indicator and the other goes to V-1 thru V-5 tubes... Does the one amp 6.3v go to the indicator.... and the 3 amp 6.3v go to the tubes? Thanks, Mule3 Title: Re: Need help with 18Watt Kit...Please Post by: wyatt on June 04, 2011, 01:47:16 PM 6.3v 3-amp winding does the preamp and power tubes (V1-V5) and the lamp. (these draw approx. 2.5A total: 0.76A per El84 and 0.3A per 12AX7)
6.3v 1-amp winding to rectifier tube (V6). A EZ81 draws 1A. Here's the schematic for the Marshall original... http://www.ampwares.com/schematics/marshall/marshall_18watt_schem.pdf You'll see Nik's layout does the same. He has a non-center-tapped 6.3V wiring to the EZ81 heaters (H1, H2) . And the center-tapped winding (3.15-0-3.15...center tapped unused in this case) to the lamp and the other tubes (F1, F2). I don't have GDS chart to see if his windings are the same way. Title: Re: Need help with 18Watt Kit...Please Post by: Mule3 on June 04, 2011, 02:00:32 PM Thanks Wyatt....
by the way.... is it possible to post pictures here? Title: Re: Need help with 18Watt Kit...Please Post by: wyatt on June 04, 2011, 03:00:03 PM To my knowledge, you have to have them hosted online already, then you use the URL inside the image tags (or the little "picture" button up above the text enter field). I don't think you can attach a picture and upload it directly to the message.
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