en Astron minimite dry electrolytic capacitors

Updated on December 2, 2021 | 411 Views No Category
0 on January 9, 2019

 

it’s my tweed deluxe 5d3 with Astron cap paper sleeves with Sprague caps inside. TE-1207 for 25uf 25V. and, 16uf 475V for 16uf 450V. I’m still after one more Astron 16uf 450V cap or sleeve. but even dead astron caps are not cheap on ebay. I tried it but the ending price went way further than I expected.

 

this 5d3 is getting closer to the original shape with the restuff filter caps. the correct switchcraft 1/4 phone plug and 18awg Gaviitt cloth wire are coming to me as well.

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  • en JMP 1959 Super Lead 1971 with Rola blackback speaker cab

  • took some pics at a friend’s place

    cabinet

    chassis

     

    the circuit board

    filter caps

     

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  • en Leesta Vall Direct-To-Vinyl Live Session

  • came from a friend who is a member of Women of the Night

    https://soundcloud.com/womenofthenight

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  • en LSD – No New Friends (Official Video) ft. Labrinth, Sia, Diplo

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  • en modern 5F1 with Boothill kit and Mergili cabinet

  • found this nicely built 5F1 with 10″ WGS speaker in Mergili cabinet on Ebay while I was in search of the parts for my first 5F1 build. grabbed it off for very good price and I’m changing the components and wires one by one like the filter caps, bypass caps, speaker wires along with the plug.

    I think the speaker wires and Amperex 12ax7 changed way more than the capacitors. I’m waiting for yellow and red Jupiter 0.022 caps as well. an A/B comparison video on youtube was very interesting. and red one looks very close to the original Astron firecracker.

    there are few tweed amp inspired cabinets around. and it’s the first cab I like except for the original ones. this cabinet sings with WGS ceramic speaker. I’ve been biased toward vintage Jensen alnico speakers so far. and this speaker changed it a bit

     

    the orange filter caps are Roederstein 33uf 450v which replaced the stock caps from the kit. I didn’t know the limit of 5y3 and was brave enough to put two of them on it. then realized the rectifier was too hot and went to 33+10+10.

    the first 33uf right next to the rectifier seems fine so far. I’ve tried on the original 5D3 and 5F1 without an issue before. this very capacitor is one of the caps I trust most

     

     

    this 5F1 is dead quiet and the filament wiring is a bit different to the original champ. I’m trying to figuring out it. nothing is easy with the electric stuff even 5F1 is this simple.

    I’ve got some NOS Sprague black beauty caps 15 years ago and tried it on this amp. I expected something vintage with them. but I’ve learned they are not useful as the coupling caps. they were good as the guitar tone caps. but they dramatically reduced the output volume regardless of the values. realized why my 18watt replica’s output volume was that low 15 years ago today. I’m still wondering why anyway. 

    [update] the sprague caps I put on this amp had twice high capacitance than the marking. I couldn’t find any 0.02 and tried 0.03 but they actually were over 0.05. higher capacitance changes the frequency and reduces the output volume as I learned from them. and NOS caps need time to break in. they sound getting louder for the last few days

     

     

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  • en a friend’s beautiful Les Paul

  • all the black plastic parts have changed with vintage correct white ones. this Joe Bonamassa burst #70 has beautiful top and dark back with ’59 profile neck and Burstbucker #2 and #3. the orignal 50’s burst Les Paul guitars mostly had 7.5k to 8.4k pickups and many of them had hotter ones on the neck position.

    Gibon’s burstbucker was made after the original PAF pickups which had unbalanced bobbins. I’d put #3 on the neck and #2 on the bridge. personally the best PAF replica was Timbucker from Tim white I got at 2003 with my Brazilian freboard 59 historic. and, at the time a few friends on Lespaulforum.com tried Seymour Duncan Custmop Shop PAF replicas and it was a great pleasure to listen them.

    The same Duncan Custom shop PAF pickups are coming for this Les paul. and I believe he’d love them over burstbucker pickups

    more vintage correct parts like truss rod cover and square jack plate are coming as well.

    This Pin was discovered by HyungSub Kim. Discover (and save!) your own Pins on Pinterest.

     

     

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  • en fender 1952 5B3 tweed deluxe restoration

  • it took a while to get the original Astron mimimite capacitors for re-stuff. came to 33uf + 22uf + 22uf and it turned out great with zero hum and Fender tweed deluxe voicing. it’s funny I met this amp a while back. a friend of mine had it. then another friend owns it now

     

     

    tried P12N and came back to the original smooth cone P12R after fixed the voice coil rub.

     

    it was like this when it came to me. the voltage dropping resistor fell off once I touched the soldering joint with my iron for 0.1 sec. a bit scary I could say.

     

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  • en Yokomo MR-4BX

  • MR-4BX series has been produced for only a couple of years. the first version came at ’06 and replaced with B-Max4 which was different from previous yoke buggies at ’08.

    MR-4BX series is like the last blood of traditional Yokomo to me. and I see the same blood on Jconcepts BJ4. 

    a few prototypes on Japanese magazines were not far from MX-4 YMP until 2004. they put a slipper clutch, moved the motor mount forward, put B4 rear arms and losi style steering knuckles, and so on.. through early ’06
    my friend who has been working with Yokomo and other japanese rc companies told me their CNC machine was never stopped for a couple of years to make new prototype parts. I know it never stopped before MR-4BX. but more than a few MR-4BX prototypes have spotted on Yatabe arena for years.
     

    I have managed to get a nicely used Worlds edition last month. and took some pics with my factory edition. they both came at ’07.

     

    the differences between them are main chassis, F/R shock towers, top deck(s), steering, rear bulkhead, and a few misc parts

     
     
    Front End

     

    MR-4BX Worlds came with a new camber mount which allows only the longest upper rod setup. also the steering is different than previous 2 versions

    this new camber mount can be installed on older versions as well

     
    the original and Factory edition’s front tower provide 6 points of upper rod mount position. the tower is compatible with the original through Worlds. and the inside position provides pretty much same result as Worlds’ front camber mount
     

     

     
     
    Steering

     

    the steerings are quite different. I hope I can feel the difference while I’m running this Worlds edition. but, didn’t have a chance so far.

     

     

    this steering was introduced with MX-4. prototype MX-4 still had older servo saver. and the first time I saw this was in MX-4 kit.

    but the difference is the angle. this steering system on MR-4BX is tilted for better handling.

     

     
     
    Chassis
     
    this 2 piece structure was came from the prototype and applied to the production models through the 1st and Factory edition. but Worlds edition came with 1 piece chassis

     

    MR-4BX Worlds came with this 1 piece chassis with 2 extra holes for new steering system. please ignore the stainless screws on the Factory chassis. I’d go back to the black steel screws.

     

     
     
     
     
    Top Deck

    the top deck, now it covers the rear belt. and new camber mount is here

    Factory edition had 2 piece top deck like the original version. but the rear piece was improved that older one has clearance problem with the belt

    the rear top deck from the ’06 original version
     
     
    Rear Shock Mounting

    there were a few guys tried this before Worlds edition came. the shocks were moved to the back end of the car.

    also they put a camber mount like the front end

    the original and Factory edition had same suspension geometry. the shocks can be moved to the back end with this stock mount plus a few tricks

    the new aluminum part which holds the the shock tower is changed along with new bulkhead and camber mount

     

     

     

    related links
    http://www.oople.com/rc/photos/reviewbx/index.html

    http://www.oople.com/rc/photos/review501x/page08.html

     
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  • en the only long plate 12ax7 I like with 5F1, Tung-Sol

  • I’ve tried a few long plate 12ax7 tubes like black plate RCA, one of the common Telefunken, gray plate Sylvania with copper grid posts, and this one. Telefunken sounds great with 5D3 but ain’t good with my original and recent 5F1 amps.

    this Tung Sol sounds like Telefunken with a modern 5F1 has Heyboer HTS-12005 PT. this PT’s B+ is over 400V with usual 5y3gt tubes. and this 12ax7 sounds great with the original 5F1 to me. grabbed off Reverb.com for $24

     

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  • en NPN Germanium transistor list for Fuzz pedals

  • My interest in fuzz pedal came from JMI Tone Bender III reissue which belongs to a friend. this pedal has 3 of OC75 glass tube transistors.

    And, unfortunately, My Sola Sound Bum Fuzz came with 3 of NPN transistors while OC75 is PNP type. then found this web page with germanium and silicone transistor lists

    http://vintageradio.me.uk/info/radiocon_data_trans.htm

    There are 26 of germanium NPN transistors from the data sheets

    ASY28, ASY29

    2N388, 2N388A

    2N1302, 2N1304, 2N1306, 2N1308,

    OC139, OC140, OC141

    AD161

    AC187

    NKT713, NKT773, NKT774, NKT781

    2SD72

     
    Black glass tube NPN transistors are OC139, OC140, OC141 from them.

     
    OC75 is like this according to this web page on alltransistors.com

    Type Designator: OC75 (PNP)

    Maximum Collector Power Dissipation (Pc): 0.125 W

    Maximum Collector-Base Voltage |Vcb|: 20 V

    Maximum Collector-Emitter Voltage |Vce|: 20 V

    Maximum Emitter-Base Voltage |Veb|: 10 V

    Maximum Collector Current |Ic max|: 0.01 A

    Transition Frequency (ft): 0.1 MHz

    Collector Capacitance (Cc): 50 pF

    Forward Current Transfer Ratio (hFE), MIN: 55

    And, for OC139, OC140 is

    Vcb: 20 V / 20 V

    Vce: 20 V / 20V

    Forward Current Transfer Ratio (hFE), MIN: 40 / 75

     
    I’m going to try OC139. simply beccause, OC139 is cheaper than OC140 on ebay. and I’m wondering how Transition Frequency differences work with Fuzz. I’ll update in a few weeks

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  • en 50’s Jensen P12R and P12N output power – from tdpri.com

  • found this nice and old datasheet probably was a part of the Jensen brochure. and it’s great to see the exact output of the 50’s Jensen speakers. P12R was the stock speaker for tweed deluxe. and now I can see why it came with tweed deluxe. btw, P12R and P12Q share the same bell cover. and you cannot install P12N and P12P with the bell in tweed deluxe because of the size.

    P12R = 12watt

    P12N = 18watt

    and, this thread in the same forum says

    P12Q = 14watt

    P12P = 16watt

    http://www.tdpri.com/threads/old-alnico-jensen-do-i-have-a-p12p-or-a-p12r.201934/

     

     

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