Spencerleehorton

Re: C414 EB P48 build
« Reply #60 on: July 25, 2020, 07:50:55 AM »
Just wondered what effect it would have on this circuit for changing the 15pf cap to 33pf?
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!


Gus

Re: C414 EB P48 build
« Reply #61 on: July 25, 2020, 09:02:34 AM »
Note how the pad works.

You would lower the gain when the pad is off

Spencerleehorton

Re: C414 EB P48 build
« Reply #62 on: July 26, 2020, 01:45:08 PM »
I've not connected a switch for the pad yet so I'll change the values to 15pf as I only had 1 x 18pf and a few 33pf polystyrene caps.
Have ordered some new ones now
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: C414 EB P48 build
« Reply #63 on: August 01, 2020, 03:27:26 PM »
Bit strange , bought some 2sk30 off ebay and used in both fet points and the circuit didnt work, replaced with one j201 and the pf5102 and seems to work but the capsule I'm using I think is shot but voltages look very close!
Must have bought a fake set of 2sk30?
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: C414 EB P48 build
« Reply #64 on: August 02, 2020, 01:35:24 AM »
Think I made a mistake!!! Just found a bc560c in there instead of bc550c, works great now!!
« Last Edit: August 02, 2020, 08:53:02 PM by Spencerleehorton »
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: C414 EB P48 build
« Reply #65 on: August 02, 2020, 08:29:34 PM »
Instead of what? Your last post seems not to make sense.
Kindest regards,
zephyrmic

Spencerleehorton

Re: C414 EB P48 build
« Reply #66 on: August 02, 2020, 08:53:42 PM »
Sorry corrected, should make sense now!!
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: C414 EB P48 build
« Reply #67 on: August 03, 2020, 12:51:09 AM »
Thanks. Now it makes sense.
Kindest regards,
zephyrmic

Spencerleehorton

Re: C414 EB P48 build
« Reply #68 on: August 03, 2020, 02:38:57 AM »
Gonna make some bodies for these now, they will be slightly wider than originals as I made the pcbs a touch wider.
I might try and mount the capsules on springs inside the headbasket.
Haven't decided what I'm going to do yet about the switching, need to find a few more choices on switches, seems to be a shortage of options with 2p4t in minature size, also with the 2p3t and 1p3t.
Also got to work out how I'm gonna mount to mic stand!!!
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: C414 EB P48 build
« Reply #69 on: August 10, 2020, 10:01:46 AM »
Is there a way to configure two dpdt switches to get all 4 patterns?

The se 4400a seems to do it with a 3 way and a 2 way dpdt, I just cant seem to figure it out yet, could anyone help please?
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!


Tim Campbell

Re: C414 EB P48 build
« Reply #70 on: August 10, 2020, 08:05:16 PM »
Never, ever mount capsules on springs unless you want to hear the springs ringing in the capsule. It only worked well for carbon button microphones.

Re: C414 EB P48 build
« Reply #71 on: August 10, 2020, 08:55:58 PM »
Agree with Tim. Compare the use of springs in reverb units.  Springs are very reactive. Capsules need to be mounted in material that gives no room for resonance.
Kindest regards,
zephyrmic

Spencerleehorton

Re: C414 EB P48 build
« Reply #72 on: August 11, 2020, 03:10:16 PM »
Fair point, I'll bin the spring idea, what about using the two switches anyone able to draw out anything for how to do the dpdt switches so to get all patterns please?
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!


 

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