one tube reverb layout into HRMd-lator

[mat]

Could someone check my terminal strip layout for the one tube reverb circuit for the dumble ?

I have got d-lator already in my clone but thought to add the tube reverb also.

The layout:

[img:670:603]http://www.pichotel.com/pic/16028B31e/141025.jpg[/img]

The B+ dropping resistor should be 27k-47k 2w one.

It is going to the Normsters HRMdlator layout :

[img1255]http://bad-domain/97HRM/97_ODS_HRM_Loop.JPG[/img]

I was thinking if I get help to verify/fix the layout, it might be for help to other newbies like me

Any correction/suggestion/comments welcome

cheers,

[mat]

What would be best place on the Normsters layout to take the voltage to Vb ? (marked as B?+ on the picture).

[mat]

131 views Anyone ?

Another question, does the two capasitors voltage rate sum also in parallel ?

Thanks,

[Bob-I]

Ok, I'll look.

First off, on the D'lator the bright switches and LNFB are not necessary. You can put there there if you like.

On the reverb, you have the red and blue wires reversed. Red goes to the B+ and blue to the tube. Next instead of having wires to the terminal strip then components to ground, run them from the tube socket directly to the ground tab. Take the 5uF bypass cap, solder the 820R resistor across it and connect the cap from the tube socket to ground. Much cleaner. Same for the 2.2k and 5uF.

For the 470pF input cap and 1M grid load, solder the 470pf from grid to terminal strip, 1M from grid to the ground tab. I wouldn't leave the 470/100K hanging in space. You can use the terminals you free'd up above for the 100K.

As for that 100K, you might want to up it to a 150k.

The B+ you're looking for, add a node in parallel to the screen node with a 10K 2 watt resistor and 22uF cap.

Your question on parallel cap voltage, no they add capacitance but at the voltage rating of the lowest cap. So if you haev a 50uF 350V in parallel with a 22uF 450V you'd have a 72uF/350V cap.

I hope that helps.

[mat]

I hope that helps

It surely did Thanks Bob-I

I have on my non-HRM build the wires as in the MSpaint picture and it works ok ?

[mat]

Is the 22uF/500V filter cap on wrong side of the 47k dropping resistor ?

Bob-I, wouldn't the 10k be too little for the dropping resistor ? I think the plate shoul be around 350V. On my non-HRM build (similar 1-tube reverb) Gary suggested

It should be in the range of 27K to 75K. Add a .1uf cap between the
resistor and transformer junction to ground. As simple as it sounds it really improves the reverb.

If the 22uF/500V is on proper position, then I might try the .1uF that Gary speaks on the other side of the 47K.

[Bob-I]

Is the 22uF/500V filter cap on wrong side of the 47k dropping resistor ?

Yes it is. I missed that before.

Bob-I, wouldn't the 10k be too little for the dropping resistor ? I think the plate shoul be around 350V. On my non-HRM build (similar 1-tube reverb) Gary suggested

The goal is to isolate the power supply stage from the screens using the RC. 10k would do that, but if you also need to drop voltage larger would be better.

t should be in the range of 27K to 75K. Add a .1uf cap between the It should be in the range of 27K to 75K. Add a .1uf cap between the resistor and transformer junction to ground. As simple as it sounds it really improves the reverb.

Without knowing the intro to that I don't know what "IT" is.

If the 22uF/500V is on proper position, then I might try the .1uF that Gary speaks on the other side of the 47K.[/quote]