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UPDATE 11/08/21: RecPro Caps are now available. Limited Quantity. Please order below.

Hi Everyone,

I'm very excited to announce the availability of RecPro Tweed-Era capacitors, made in the USA and offered through my RecPro Audio division.

The reason I have gone to the considerable effort to make these capacitor recreations available is because, until now, there has not been a truly Tweed-era correct signal capacitor available anywhere, anytime. (Unfortunately, like much else I discover in the world of reproduction components, nobody is really coming clean regarding the accuracy of their capacitor recreations.) So, starting today, faithfully recreated Tweed-era capacitors now exist and are available (only here at the Speed Shop).

As with my A12Q/A10Q speaker reproductions and TD58OT output transformer recreation, etc., I spent a lot of time doing research. In the case of these capacitors, many weeks elapsed reading patents, dissecting old caps, talking to people, etc. - to better understand how these old caps were made, as well as the materials they were made with.

It is important to know that it is not possible to create *exact* clones of old caps today, because some of them were made with solutions containing PCBs, and the machinery no longer exists to support the construction techniques utilized. However, these are minor obstacles to overcome as they don't affect the performance of the cap (in the world of guitar amps) and modern alternatives exist.

What is of utmost importance, however, are the materials used in the winding of the capacitor - which are available today.

This is everything.

Yellow Astron Capacitors

Made in the USA, RecPro capacitors are constructed with the right stuff, the very same winding materials used back in the late '50s by Astron in their Blue Point yellow capacitors.

Please note: The packaging of the windings differs from the originals - yet, though they will appear different, they will be equal with regard to the high level of protection afforded the windings from temperature changes, humidity, shock, etc. - in other words, just as heavy duty and stable. (Packaging in no way affects the performance of the capacitor.)

So, if you are chasing period-correct tone, it makes sense to use capacitors made with the same materials - because there is a difference. For Tweed-era amplifiers, these capacitors provide the confidence in knowing that the right part is in the circuit - the most authentic possible component short of NOS.

In closing, if you seek the real tone and performance of late Tweed-era Fender amplifiers, please consider these RecPro capacitors. They are as close as you can get, today, to the originals - and they are only available here, direct thought the Speed Shop.

How Do These Capacitors Sound and Perform?

I've spend many hours auditioning these caps in a 5E3 test chassis and can attest they sound fantastic.

RecPro Tweed Amp Capacitors

I try to avoid using generic terms like 'mojo' and 'tone' that don't really quantify anything, so I have taken to using the term 'musical' to describe experiencing the musical ability or musicality of something.

For me, this means when I play a very good amp I am inspired to write or compose, as music just seems to emanate from it. As in the way a great acoustic guitar can take a simple thing you play and transform it into a progression / riff / figure / etc., that could support the foundation of a composition or track - whereas on an average guitar the same part might sound lackluster and lead nowhere. Again, similar in how a great voice can make all the difference in the accessibility or sensibility of a song.

Perhaps it has something to do with harmonic distortion and how it contributes unique character to fundamental frequencies. Likewise, maybe the less musical components of a sound are somehow suppressed. In any event, I hope that the term musical helps better describe how the response of great instruments provides a greater inspiration and the impetus to [more effortlessly] create.

Speaking more quantifiably, initial impressions indicate these vintage-style caps lightly soften the very high frequencies, facilitating a slightly more focused, natural response with less collateral resonant frequencies (that often just add noise and cloud the fundamental). Overall response is very smooth and compressed, with violin-like leads at more overdriven settings.

The Details:

RecPro Caps are $15 each

Tweed Deluxe Cap Kits are $99 each

(Cap Kits consist of all the signal caps required to build a stock Deluxe. Included are: 4x .1uF caps, 1x .02.uF cap, 1x .005uF cap, 1x vintage NOS El Menco 560pf bright cap. Electrolytic caps are not included.)

Tolerance is +- 10% - just like the originals.

I was hoping to offer these caps at a lower price point, but they are expensive to manufacturer and this is simply the cost of doing things the right way. I am basically taking a loss on the first small batches and hope that I will be able to order larger quantities in the future so that I can continue to offer these great period-correct capacitors. So, availability is very limited right now.

US sales only at this time, please email regarding international orders.

$9.95 flat rate USPS shipping on all orders.

Again, very limited availability at this time.

Thank you, all,


"Ron I have to give it to you. Those caps are as close to yellow Astrons as you can possibly get. This amp now sounds beautiful, responsive, airy, musical and just a joy to play through. I went head to head with the Yellow Jupiters, the Red Jupiters and your Yellow RecPro's. Your caps are staying in the amp permanently. Old blues riffs and Hendrix type grooves just flowed and that's when you know its working. There is this musicality to the note that makes you want to keep playing. The amp is fully restored now and wanted to say THANK YOU. " - T. B. (1960 Bassman)
1960 5F6a Fender Tweed Bassman restored with RecPro Capacitors
5E3 Board with Stock Value RecPro Capacitors
Order Your Recpro Capacitors Below: (Supply is limited at this time. Please try to keep orders to a maximum of 10 individual caps, or 1 kit.)
.1uF 600V

$15 Each

RecPro Tweed Amplifier Capacitor .1uF 600 Volt

Sold Out.

.02uF 600V

$15 Each

RecPro Tweed Amplifier Capacitor .02uF 600 Volt

.01uF 600V

$15 Each

RecPro Tweed Amplifier Capacitor .01uF 600 Volt

Sold Out.

.005uF 600V

$15 Each

RecPro Tweed Amplifier Capacitor .005uF 600 Volt

Sold Out.

5E3 Capacitor Kit

$99 Each

RecPro Tweed Amplifier Capacitor Kit includes full set of 5E3 signal capacitors: 4x .1uF, 1x .02uF, 1x.005uF, and also includes 1x 560pF vintage NOS El Menco six dot mica cap.

Sold Out.

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