PeeCeeBee V4H GB

[pieter t]

Hi Shaan,
Did you consider something like this?
http://hifisonix.com/wordpress/wp-content/uploads/2012/08/Speaker-Relay-V1.03.pdf
This seems to improve on relais based solutions.

 

[ckwong99]

Noted

 

[Medisinmannen]

Made a BOM on mouser. Sharing is caring. May be faults within, please let me know.
- 0.1 ohm 5W is on ebay
- No power transistor
- Order more BC transistors for matching
- Uncertain if connectors fit/optimal


Link to mouser BOM, for stereo(2 boards)

 

[supernet]

Burklin has MPC71 0.1 ohm 5W resistors:

Futaba Metal strip resistor, 0.1 Ω (R10), 5 W, TK +-350 MPC71 0R1 K | Burklin Elektronik

Probably they will fit well into 10 mm hole.

 

[shaan]

Made a BOM on mouser. Sharing is caring. May be faults within, please let me know.
- 0.1 ohm 5W is on ebay
- No power transistor
- Order more BC transistors for matching
- Uncertain if connectors fit/optimal


Link to mouser BOM, for stereo(2 boards)

Looks like there is 0.01uF quoted. It should be 0.1uF.

 

[shaan]

Hi Shaan,
Did you consider something like this?
http://hifisonix.com/wordpress/wp-content/uploads/2012/08/Speaker-Relay-V1.03.pdf
This seems to improve on relais based solutions.

SSR is a great thing but compared to mechanical relays still has a long way to go regarding simplicity and off state behavior. I do believe that these will improve with time and in near future people may use only SSRs.

 

[Medisinmannen]

Looks like there is 0.01uF quoted. It should be 0.1uF.

Nice catch! Looking forward to getting the boards.
Ordered the 0.1 resistors on ebay, dirty cheap, 2-3$ for 10. Shipping takes time tho

Link to updated BOM(mouser) here

 

[shaan]

PSU is UP!

Both protection modules started successfully. Both relays turn on in ~4 seconds after power up and instantly disconnect at power off. Next I will measure DC response time and minimum level of DC that triggers the protection mechanism.

I was a little unsure whether both would work or not, because like the positive and negative halves of PeeCeeBee amplifiers, the two speaker protection modules are symmetrical to each other i.e. using complementary transistors on each side. This was done to keep the load on both rails equal as the module on the left side draws current from positive rail and the one on the right side from negative rail. As a result DC rail outputs are very close to each other. The transistors are the same as used in V4 and V4H amplifiers i.e. BC and KSE pairs.

The right relay turns on about 0.5 second after the left relay. Not a large gap but I am thinking of installing a trimmer on each side to make them turn on in unison, if desired!

More coming soon. Stay tuned.

 

[shaan]

GB Update:

ckwong99 - 10 PCBs + 4 set of MOSFETs - SHIPPED
Kokanee - 2 PCBs + 1 set of MOSFETs - SHIPPED
vgeorge - 2 PCBs + 1 set of MOSFETs - SHIPPED
gwrskien - 4 PCBs + 1 set of MOSFETs - SHIPPED
bambadoo - 4 PCBs - SHIPPED
medisinmannen - 2 PCBs + 1 set of MOSFETs - SHIPPED
jacques antoine - 2 PCBs - SHIPPED
Asuslover - 2 PCBs + 2 Pair MOSFETs - SHIPPED
vasillis - 4 PCBs + 3 set of MOSFETs - SHIPPED
fencki - 2 PCBs - SHIPPED
meanman1964 - 2 PCBs - SHIPPED
craydive - 2 PCBs + 1 set of MOSFETs - SHIPPED
jls001 - 2 PCBs (2 x pre-assembled modules) - SHIPPED
Nisbeth - 2 PCBs - SHIPPED
muthumuthiah - 2 PCBs (stereo kit) - SHIPPING PAID
rajesh - 2 PCBs (2 x pre-assembled modules) - SHIPPING PAID
Master Pain - 2 PCBs (stereo kit) - SHIPPING PAID
mexakin - 2 PCBs - QUEUED
pieter t - 2 PCBs + 2 sets of MOSFETs - QUEUED
reaper996 - 2 PCBs + 1 set of MOSFETs - QUEUED
883bkong - 2 PCBs - QUEUED
emynet - 2 PCBs + 1 set of MOSFETs - QUEUED
patriz - 2 PCBs - QUEUED
CitizenKane - 6 PCBs - QUEUED
Lutto - 4 PCBs - QUEUED
mj777 - 2 PCBs - QUEUED
yoaudio - 2 PCBs + 1 set of MOSFETs - QUEUED
yoaudio - 1 PCB + 4 MOSFETs - QUEUED
Rick G - 2 PCBs - QUEUED
waeah - 2 PCBs + 1 set of MOSFETs - QUEUED
solviken - 2 PCBs + 1 set of MOSFETs - QUEUED
kpsthakur - 2 PCBs - QUEUED
OZAM - 2 PCBs - QUEUED
topicreader - 2 PCBs + 1 set of MOSFETs - QUEUED

I will send the rest members shipping invoice today and tomorrow.
If there is a mistake in the list then please let me know.
Thanks.

 

[supernet]

Hi Shaan..miss my nickname


BTW: Did you try your amp board with MPC 71 5W 0.1 ohm resistors too?

Futaba Metal strip resistor, 0.1 Ω (R10), 5 W, TK +-350 MPC71 0R1 K | Burklin Elektronik

 

[shaan]

Hi Shaan..miss my nickname


BTW: Did you try your amp board with MPC 71 5W 0.1 ohm resistors too?

Futaba Metal strip resistor, 0.1 Ω (R10), 5 W, TK +-350 MPC71 0R1 K | Burklin Elektronik

Hi Andrej.

List in the text file in my PC has you so don't worry.
Will be added along with Hemant07 in next list update.

The resistors I use are all generic 5% wirewound and are not non-inductive. You can use practically any 5W resistor.

 

[supernet]

Hi Andrej.

List in the text file in my PC has you so don't worry.
Will be added along with Hemant07 in next list update.

OK

The resistors I use are all generic 5% wirewound and are not non-inductive. You can use practically any 5W resistor.

These MPC resistors have 9 mm raster between legs, but with mm above the pcb, they should fit nicely.

 

[bobo le chat]

Pcb V4

Shaan...interested into 2 V4H PCBs
Best regards
Roger

 

[CitizenKane]

Hi Shaan..miss my nickname


BTW: Did you try your amp board with MPC 71 5W 0.1 ohm resistors too?

Futaba Metal strip resistor, 0.1 Ω (R10), 5 W, TK +-350 MPC71 0R1 K | Burklin Elektronik

MPC 74 is the better, audio grade, type.

 

[vvs07]

I'd like to get four V4H boards when available. Please add me to your list for next GB. Thank you!

 

[jls001]

jls001 - 2 PCBs (2 x pre-assembled modules) - SHIPPED

Received today!

 

[shaan]

 

[Rick G]

Question.
Do we use same setup procedure as in V4 for the V4H?

 

[shaan]

Hi Richard.

Yes it's the same. Only difference is that total MOSFET bias is 200mA so total amplifier bias to be set is 210mA.

 

[Kokanee]

shaan,

Sorry, posted on wrong GB. Package arrived in Calgary. Thank you

Myles