If you have purchased a vintage amplifier and have not changed the power supply capacitors, you have a time bomb on your hands.
Don't fool around with NOS capacitors unless you are looking for trouble.
Please read the Disclaimer below before purchasing.
Although targeted for the MC240. this kit can also be used on other amplifiers as well. Our Power Supply Refurbishing Kit includes the following:
(2) 80/40/30/20 @525 V Twist Lock Cans CE Manufacturing USA Made, Brand New
Made in the USA, to Mallory's original specs, on Mallorys original machinery. 80 µF, 40 µf, 30 µF and 20 µF section, all rated at 525 VDC.
1-3/8" diameter x 3" tall
Made in the USA by CE Manufacturing
You can replace the the (2) 100/30 uf cans in the MC75 with these (connect the 80/40/20 uf sections together to get increased capacitance of 140 uf, use the 30 uf as is). These cans can be used anywhere the original cans of similar size are used.
OR (Depending on Availability)
(2) 100/100 @500V @525 V Twist Lock Cans CE Manufacturing USA Made, Brand New
Made in the USA, to Mallory's original specs, on Mallorys original machinery.
- 2 sections - both 100 µF @ 500 VDC
- -10%, +50% tolerance
- 55° temperature rating
- 1-3/8" diameter x 4" tall
You can replace the the (2) 100/30 uf cans in the MC75 with these directly. Connect the first 100 section to where th old went, and connect the second 100 section where the 30 section went. Very simple direct replacement connections. These cans can be used anywhere the original cans of similar size are used.
(2) German Made Authenticap 250uf/250V Brand New Isolated Twist Lock Cans for the voltage doubler
These are also direct fit, no chassis modifications or clamps required.
(1) 22uf /200V Electrolytic for replacing the Bias Filter Cpacitor. (Note: this is supplied as either a single 22 uf capacitor rated at 200V or greater, or (2) 47 uf capacitors rated at 100V, to be used in series).
(1) 3A 1000V PIV Silicon Diode for replacing the Selinium rectifier
(1) 10K Trim Potentiometer (POT) (we actually give you a few different values), for adjusting the bias voltage to the proper level (compensating for the lower silicon diode drop and adding more precision). The POT is simply uses to determine the correct resistor value for your bias circuit, of which you then obtain and install. Its explained in the insatalliton tips.
Guide to installation - offer tips for easier installation- assumes you have the tools and technical knowledge and experience to do the work.
Most of these these items are sold sperately in my Ebay Store as well.
Please note that this kit is not to be used by inexperienced users. There are high, potentially lethal voltages inside the MC240 and other tube amplifiers. If you don't know what you are doing, don't buy this kit OR contact us to schedule an installation for you. We provide installation services for all the parts we sell.
We do not take responsibility for personal injury, destroyed or broken amplifiers as a result of improper installation or lack of knowledge or tools. The guide we provide assumes you already have a knowledge of proper component installation techniques and the proper tools. This is not a trival task. The guide is by no means a detailed step by step installation guide.
Purchase more than (1) kit, or purchase other compnents and services from us and we combine shipping to save you money.
We also have Twist Lock can direct fit capacitors for a variety of other equipment such as the McIntosh C22, MX-110, Scott 299, Dynaco MKIII, and ST70 as well as for Guitar amplifiers. We also have the other Capacitor cans for the listed units available.
We offer complete power supply restoration kits for most amplifiers, preamps and tuners. An installation service for what we sell is available as well. We have more of these in our Ebay Store.
Tell us where you will be using these capacitors, and we will give you instructions on where and how to install them. Or, we can install them for you at a nominal charge + shipping. Your can email us or call us to discuss your application and our installtion services. Our contact information is in our EBay store.
Our company CTech Electronics stands behind all of its products and services. Bid with confidence.
Unlike our competitors, we are a full service company offering bot parts and repair/diagnostic services. We have the technical qualifications to solve your problems should any arise.
Please shop our Ebay Store: