Power Amp PSU Board (for e.g. LYNX Amp)

[peranders]

Pcb price

The pcb price is added now. I will send an email to each one of you and re-reconfirm your order. Then I'll send you a Paypal invoice and I'll hope you'll pay me fast so I can order soon. Before that I'll order a prototype series.

Notice that I'll charge you once more when it's shipping time because it's hard to calculate shipping costs at this state. Most items will go as plain letter but some of you have really heavy stuff so send it in an envelope will not be a good idea.

Notice that some of you have order rather odd quantities of the connectors. Minimum is 5 pcs of 2-pole connectors = 10 poles. This connector must be used as 2 and up in each position. Mounting only only one pole is not a good idea.

 

[peranders]

The pcb will look really nice. Gold on the pads.

 

[HenrikS]

Hi P-A

I have a question about R9-R12, it says "Adjust the value after needs"

How do I know which value I need? I will use a 2x27V trafo with this PCB.

Thanks

 

[peranders]

R9, R10:

How much power dissipation can you put up with and how long discharge is desirable? Which value you choose has to do with how much capacitance you'll have. R * C = time to get 37% voltage. 1 kohms is minimum if you have 63 V supply voltage.

R11, R12:

This option is applicable only for class A amps. The value will probably land between 0.5-5 ohms I should think.

In your case:

R9, R10 = 1k0-2k2

R11, R12 = 0 ohms (shorted with a wire)

 

[peranders]

Please notice that I wrote 24 poles per pcb. It's 20 poles. I'm going to email each one of you and ask what you really want and also double check before I'll send out Paypal invoices.

 

[peranders]

It's not too late to sign up. I'm in the process of collecting money but nothing is ordered yet.

 

[peranders]

I have ordered prototype series today.

 

[HenrikS]

Woho.

Hope everyone is fast with their payment. Can you send out the PCBs to us in Sweden first? Would be nice to get these as fast as possible after the prototypes are confirmed.

 

[peranders]

Usually I'll post everything as soon as I'll get the boards. Remember though that shipping is not yet paid for.

 

[peranders]

Personal message to jimt.

I'm getting messages that my email to you is delayed. I'm not sure this was coming from the first email I sent or the second. Could you please confirm that you've got an email from me yesterday.

Undefined network status or routing status.

 

[samoloko]

what type of transformer Is recomended to use with pcb - center tapped or dual secondaries or no matter

 

[peranders]

The pcb is made for a dual secondary windings transformer but you can patch the pcb for a center tap type. I will make a instruction for this later on.

 

[JimT]

Personal message to jimt.

I'm getting messages that my email to you is delayed. I'm not sure this was coming from the first email I sent or the second. Could you please confirm that you've got an email from me yesterday.

Undefined network status or routing status.

peranders,

Our email server has been having problems for most of the last week. Email has been delayed and some lost. I believe it is finally fixed. Please try again.

Thanks
Jim

 

[peranders]

Personal message to alexyz.

Since you are a new member you are not allowed to email other members (unless any moderator let you of moderation). Meanwhile send a message to me via my homepage under "contact us". You are the last one I can't reach.

 

[samoloko]

Hi P - A


how can be done converting the pcb from dual secondary to center tapped - Is It required to cut some routes on the pcb layout or there are some jumpers - being a flexible Is very good
what Is the max power that pcb can handle
are the X3 and X4 optional

 

[peranders]

I will show this later but you'll need some wires soldered in.

The pcb can handle rather many amps and rather high voltage. I don't have the exact figures but the fuses can handle 10 A.

If you of some reason want to insert some R or L you can do that. Normally you don't have those resistors or inductors.

 

[RyanW]

Sorry guys, I had to pull my order. This group buy took a very long time to get off the ground and things have changed since then. I hope this does not screw up the total quantity.

 

[peranders]

I'm glad you finally responded. No problem to get off this train. I sure can agree that it has taken a long time. That's why I thought I should do something.

 

[DubbLinn]

I have added my name to Wiki for 2 PCB's and 12 connectors. I can't email "peranders2 as I am still under moderation.
Hope that is OK.

 

[peranders]

Email me via my homepage