magnatone 260-a guitar amp

magnatone 260-a guitar amp http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html Came across this little amp from a friend of mine that I had done some website work for. Basically it was a “somewhat” functional, meaning the chassis was there along with most of the parts. Since I am not much for a clean or bluesy sounding amp I decided to gut the preamp and phase inverter to do some hotrodding, thus giving the amp a new life. I started with a basic Marshall 1987 preamp and phase inverter coupled to the original power amp section. The first set of mods that were done were putting in a switch that would cascade the bright channel into the normal channel for a major gain boost, added a switch to change the cathode resistors on the normal channel from stock (820 ohm / .68uf cap) to just a 10k (ala JCM800). This gave the amp plenty of gain on tap. Not bad for a 40+ year amp. It still lacked the modern grind that you hear some people playing. So I had decided to mod the preamp a little more. During the testing phase of the updated preamp section, one of the filter caps decided it was tired and quit working. So right now it is sitting incomplete until I can get some more can caps. Front Panel http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#0 440e7d82-6c89-402a-9a5d-256ec86e70e3 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03972/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03972/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03972/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Front Panel</p></div></div> Front Panel 2 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#1 24f0afbe-54b5-445c-9f99-433124a16a93 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03973/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03973/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03973/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Front Panel 2</p></div></div> Point to Point Wiring http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#2 0078373f-3ba0-4e3b-a5e8-f125f6731a8e http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03969/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03969/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03969/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Point to Point Wiring</p></div></div> Mains, Rectifier, Filter Cap http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#3 f8f33fa3-db62-4b6e-86d7-3ca13f15a4f4 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03970/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03970/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03970/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Mains, Rectifier, Filter Cap</p></div></div> Preamp, Controls, PI http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#4 47162ad7-4fed-4a16-9784-ddc60f390549 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03971/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03971/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03971/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Preamp, Controls, PI</p></div></div> Original 5881s http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#5 825dc642-a3e9-4476-8fa3-1bc0c1f505bd http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03974/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03974/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03974/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Original 5881s</p></div></div> Big Iron http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#6 7a91ea76-1e07-4166-af22-5b33da567f36 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03975/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03975/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03975/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Big Iron</p></div></div> Had to use the big iron on the old solder http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#7 10a04317-4108-458b-9aa2-0e58643543c1 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03976/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03976/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03976/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Had to use the big iron on the old solder</p></div></div> Preamp section removed http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#8 79d89865-d464-4437-b437-812a5afdc1c0 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03977/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03977/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03977/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Preamp section removed</p></div></div> Coupling Caps http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#9 a71da847-e88e-4420-a33c-6301cf2df557 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03978/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03978/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03978/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Coupling Caps</p></div></div> Saving parts for later use http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#10 5b6e7888-9930-4c34-8b94-a8b34ecf3012 http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03979/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03979/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03979/mip.jpg

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_233_48"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Saving parts for later use</p></div></div> Cleaning up the power section http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A.html#11 7851d599-904b-466c-895d-7c00b3fce72f http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03980/thumb.jpg http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03980/micro.jpg

http://www.attentiontodesign.com/Site/Amp_Collection/Pages/Magnatone_260A_files/Media/DSC03980/mip.jpg