F5m kit

[twofires]

But seriously though, another M3 preferrer here.

 

[Peppe]

M2 for me!

that amp is best ever!!

Which brings to the (off-topic) question: is there (or ever been) an M1? 😕

 

[Mark Johnson]

Have a look at the First Watt product table over on firstwatt.com .

_

 

[ItsAllInMyHead]

Which brings to the (off-topic) question: is there (or ever been) an M1?

 

[TungstenAudio]

M1

 

[Peppe]

Have a look at the First Watt product table over on firstwatt.com .

_

Exactly looking at that table I noticed the missing piece (the question did not arise for the J2 since there is an F1J... I am guessing) 🙂

But if I am allowed to (one last) off-topic, then this is the only M1 that comes to my mind. 😎

 

[Russellc]

https://gundigest.com/more/classic-guns/m1-garand-americas-original-battle-rifle/amp

 

[william2001]

is there (or ever been) an M1? 😕

I use the vanilla 5W-30 in my new vehicle. I don't think it's as good as it used to be though after they tinkered with the formula...

 

[Toys4Boys]

Is this the appropriate Power Inlet Module for Modushop Dissipante-Frontale DA 10mm?

 

[WBS]

This is the one shipped with the back panel kit from the store.
https://www.mouser.com/ProductDetail/Schurter/4304.6090?qs=SkYLJkUpGh1O7%2BOWjtJ4SQ==

 

[vinay]

I found a 20V dual primary transformer collecting dust, can I use this as a drop in without any further mods ot the PS or the amp?

Regards, Vinay

 

[poseidonsvoice]

I found a 20V dual primary transformer collecting dust

If you have a 20V dual secondary transformer, you may use that for the F5M. Your rectified voltage will be around 27-28V DC which is still fine even with the JFET input stage. I am assuming you have 120V primaries available to connect to your AC mains.

Best,
Anand.

 

[vinay]

If you have a 20V dual secondary transformer, you may use that for the F5M. Your rectified voltage will be around 27-28V DC which is still fine even with the JFET input stage. I am assuming you have 120V primaries available to connect to your AC line.

Best,
Anand.

Yes to all.

 

[Zen Mod]

Your rectified voltage

with A Class amp as load, and usual rectifier/filter arragement, count on 1.25 multiplying factor

18Vac resulting in usual 22V5dc ........ 2 volts more ............ 24V5dc

leeway is Volt or so

in any case, 20Vac sec calls for 35Vdc caps

 

[Toys4Boys]

This is the one shipped with the back panel kit from the store.

Thanks, I think that I ended up using that for my A Jzm.

 

[vinay]

in any case, 20Vac sec calls for 35Vdc caps

Speaking of Caps, I have some old school beer can caps( 47-68k uF, 50 or more V) that I could spruce up, tho would need to wired to the PS boards as they are screw terminals.....or should I just go with the modern ones recommended for these projects to keep it simple and compliant with the designs.

 

[WBS]

Use what you have as long as they meet the voltage and uF criteria.

 

[poseidonsvoice]

leeway is Volt or so

A volt or two between friends 😉 . Forgot about the high bias Class A load, and smaller VA donuts, silly me .

I always end up using at least 10V DC more for electrolytic caps due to variation of AC mains voltage (119-123 at my home).

Best,
Anand.

 

[vinay]

A volt or two between friends 😉 . Forgot about the high bias Class A load, silly me .

I always end up using at least 10V DC more for electrolytic caps due to variation of AC mains voltage (119-123 at my home).

Best,
Anand.

voltage rating aside, is using large capacitance better of just stick to the as designed PS?

Regards, Vinay

 

[poseidonsvoice]

You can use larger capacitance up to a point. Just remember the inrush current is more (which taxes your thermistor, power switch, etc…). For more details and calculations, see my post here. If this is a new build or you are a new builder, suggest sticking with the original design so your maiden voyage is without fireworks. I personally try to limit as much ptp wiring as possible to minimize points of failure.

Best,
Anand.