Refining BOM for D'clone build, questions.

[Guitarman18]

I’m just in the throws of finalising my Mouser order for my first full D’clone project and find I have a few questions that need answering. So if you can spare the time and you can answer any of them, I would be very grateful.

Here goes……..

Q.1. The Hybrid A BOM is the only one that list a specific impedance switch (as far as I could see). Is the one listed below suitable for a Funk chassis build?

http://www.mouser.com/Search/ProductDet ... 2511F-43RN
= rotary impedance switch (Mouser part ~ 105-SR2511F-43RN )


Q.2. I’m getting Heyboer Twin iron with an extra 6.3 tap to supply the relays ( R40-11D2-5/6 - Mouser part #526-R40-11D2-5/6) and was wondering if the NTE962 (Mouser part #526-NTE962) was a suitable voltage regulator, or does anyone have any preferences for any others?



http://www.mouser.com/Search/ProductDet ... 526-NTE962 = Voltage regulator NTE962 (Mouser part #526-NTE962)



Q.3. As I’m doing a full on 80’s/90’s non HRM build with the precision power supply with 8 radial (Xicon?) caps, are ½ inch standoffs correct, a) for the tall components to clear the top of the chassis and b) allow for all the wire dressing that passes underneath the preamp board etc.




Q.4. In the 80’s/90’s BOM it lists ‘3A Fast Recovery Diodes’ (x6) and suggests 1N5408 (Mouser part ~ 625-1N5408-E3 http://www.mouser.com/Search/ProductDet ... -1N5408-E3

However the 1N5408 is listed as a ‘Standard Rectifier’ and not a ‘FRED’. Should I go for the 1N5408 or a Fred such as the FR307G ( Mouser part ~ 583-FR307G http://www.mouser.com/Search/ProductDet ... 583-FR307G )


Or have others just used the proverbial 1N4007 (Mouser part ~ 625-1N4007-E3 http://www.mouser.com/Search/ProductDet ... -1N4007-E3 )


Q.5. Am I correct in thinking that the electro caps in the FET board need only be 100V or less?


And finally……

Q.6. With the VD RN65’s I notice that some members are using the RN65’C’ and others are using RN65’D’. Is this significant or did I read somewhere that the ‘C’ is the same thing but with a Mil- spec rating of ¼ Watt?


Many thanks in advance for any help you can offer with this one.

[Structo]

Don't know if you are trying to buy everything from Mouser but the impedance switch I used and it seems that a lot of other guys use is the one Hoffman sells.
It is really heavy duty and is rated at 6 amps @ 125v.
It's quite a bit more than the Mouser switch but it is the real deal.
Scroll down about half way.

http://www.hoffmanamps.com/MyStore/perl ... =341270995

[heisthl]

Mouser has the same switch as Hoffman sells for a lot less:
http://www.mouser.com/Search/ProductDet ... -HS13-Y-RO

[nickt]

Mouser has the same switch as Hoffman sells for a lot less:
http://www.mouser.com/Search/ProductDet ... -HS13-Y-RO

Nice to know. Problem is Mouser always uses UPS or similar while Hoffman uses USPS. So Hoffman is way cheaper on international shipping as a result.

Win some lose some I guess, for us non-US folks

[heisthl]

You can request USPS,UPS or FedEx from Mouser (at least on a domestic order).

[Guitarman18]

Structo wrote:

Don't know if you are trying to buy everything from Mouser but the impedance switch I used and it seems that a lot of other guys use is the one Hoffman sells.

Thanks for the information. The Hoffman unit looks much more substantial than the Mouser one listed in BOM. And yes, I am trying to combine as much as I can into my Mouser order, hoping that the shipping to the UK overall will work out less than lots of smaller orders. (We'll see!)
Cheers Structo.

Heisthl wrote:

Mouser has the same switch as Hoffman sells for a lot less:

Thats great news, I'll amend my order ASAP.

Heisthl also wrote:

You can request USPS,UPS or FedEx from Mouser (at least on a domestic order).

I will definately keep that in mind when I get to the checkout. I'm trying to get enough parts for 3 builds, so it is going to hurt

Thanks Heisthl.

[dimitris]

I can confirm that Mouser has USPS option for international orders too.They have send me things to Greece that way.

[Normster]

Q.1. The Hybrid A BOM is the only one that list a specific impedance switch (as far as I could see). Is the one listed below suitable for a Funk chassis build?

The Alpha is probably not robust enough for a 100 watt Dumble. NKK would be better IF it will fit in Funk's chassis. (As I recall, I had to use a NOS Stackpole because the NKK wouldn't fit.) Check with Funk for the "real deal" impedance selector.

Q.2. I’m getting Heyboer Twin iron with an extra 6.3 tap to supply the relays ( R40-11D2-5/6 - Mouser part #526-R40-11D2-5/6) and was wondering if the NTE962 (Mouser part #526-NTE962) was a suitable voltage regulator, or does anyone have any preferences for any others?

Look up LM7812 for 12 volta regulator, LM7805 for 5 volt, etc.

Q.3. As I’m doing a full on 80’s/90’s non HRM build with the precision power supply with 8 radial (Xicon?) caps, are ½ inch standoffs correct, a) for the tall components to clear the top of the chassis and b) allow for all the wire dressing that passes underneath the preamp board etc.

1/2" standoffs are perfect.

Q.4. In the 80’s/90’s BOM it lists ‘3A Fast Recovery Diodes’ (x6) and suggests 1N5408 (Mouser part ~ 625-1N5408-E3...

Should be UF5408, not 1N5408 for ultra fast diodes.

Q.5. Am I correct in thinking that the electro caps in the FET board need only be 100V or less?

I used 50V for all 3 caps.

Q.6. With the VD RN65’s I notice that some members are using the RN65’C’ and others are using RN65’D’. Is this significant or did I read somewhere that the ‘C’ is the same thing but with a Mil- spec rating of ¼ Watt?

I think RN65=1/2 watt. (RN60=1/4 watt?) Not sure what the D and C signify.

[Guitarman18]

Normster wrote:

NKK would be better IF it will fit in Funk's chassis.

I will check with Funk to see what fits. Do you happen to remember where you got the NOS Stackpole?

LM7805 for 5 volt

I had my suspicions about the LM7805, but most threads talk about the LM7812 in 12v relay setups, when using NEC relays but there seems to be few references to voltage regulators in 5v setups, so I wasn't sure. It's nice to have confirmation. I'm hoping not to build a lemon!

Many, many thanks Normster for answering all my questions, I feel a lot more confident to boldly tread where many have gone before.

Paul.