![]() I'm not Marshall knowledgeable but they seem pretty OK, to me.Īlso for added fun-I tried VMS's method he pointed out in post #40 for measuring resistance across the two OT primary sides, then measuring the voltage drop and dividing the voltage drop by the resistance-if I understood it right? here goes: For those why know what the voltages should run on this amp, please check it out and let me know if they are OK. According to the Weber bias calculator running AB with E元4's at 464V plate voltage bias should be 37.7 mA. So I need to get down to what the bias mA should be running that plate voltage. It's pretty high on the power tube side(464), but that may be right for this one-you tell me? No red plating detected and the tubes don't feel abnormally hot. Boy is this thing loud!!!!Īnyway I'm not familiar with what Marshal voltages are suppose to be since they didn't put the expected voltages on the schematic like fender. So I pulled out each preamp tube and tried a known good tube and when I got to V1 it started working fine. Had a rough time at first because I had no sound with a guitar plugged in but could hear the amp driving the speaker. Voltages are provided/recorded on a scan of that 1987 schematic attached below. I just got through firing it up for the first time. Some items we just can’t take back for returns, due to a one time function like strings or drums heads and other times it’s not sanitary to do so with microphones or harmonicas.Well it won't be the first thing I put together I didn't understand but still worked We reserve the right to charge a restocking fee based on the return condition. Why is that number important? This will allow us to speed up the process of the return. Most times we will give you an RA number (Return Authorization). Please contact us as soon as possible if your order was received incorrectly, damaged, or defective. If the product was shipped for free, the charge will be deducted from refund, unless the reason for the return is outside normal circumstances. Please pack the product safely for the journey back to us. Most new items may be returned within 30 days of delivery and most vintage & used items may be returned within 3 days of delivery for a full refund, exchange, or store credit. If you placed your order on Amazon or eBay, we advise issuing the return request from your account on the platform of purchase - our Customer Service team will process a refund upon receipt of the item(s). ![]() If you decide you'd like to return an item, please contact your Sales Rep, chat us, or give us a call. That’s why we offer an easy return policy to take the stress out of purchasing from us. We understand that sometimes you get a piece of gear that doesn’t work out for you. We’re all musicians here at Chicago Music Exchange and we want you to love the gear you get from us. Please don't hesitate to reach out or call us directly at 77. If you have any questions, comments, or concerns, we want to know. Our shipping, sales, and customer service teams are always striving to create the best experience for you. Our Bottom line: We care! This is something we take very seriously, because it's what you deserve. Most orders ship the same or next day: We greatly appreciate your patience, and are working hard to fulfill all requests as quickly as possible, while practicing recommended safety guidelines. We are here to put your mind at ease and make your transaction smooth and enjoyable! As musicians ourselves, we want to make sure everything gets to you the way it should, every time. We realize that the online ordering of guitars and instruments, in general, can be a nerve-racking experience. ![]() ![]() The CME Difference: CME's mission is to make sure your shipment will arrive quickly, carefully, and correctly. You read that right! Any orders over $30 ship for free!*
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