the Poor Man 660 support thread

[[silent:arts]]

where I bought my tubes:

6BC8:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250120083458
(12 available)

5687
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370032463151
(8 available)

 

[Nele]

Some Farnell corrections:

CHANNEL

2N6107 -> 1017665 leads to a BC214... Is this correct?


PSU

1N4007 -> 9549129
1N4764A -> 9398511 (3,5W)
1N4747 -> 1467599 (1W)
IRF820 ->8648514


Adios,
Corneel

 

[synthi]

Googling and reading for the 5687 type tubes, I`ve read that 5687WB have higher distortion than a plain 5687 or 5687WA, any comments? urban myth?

Synthi

 

[[silent:arts]]

[quote author="Nele"]2N6107 -> 1017665 leads to a BC214... Is this correct?[/quote]
of course not
thanks for the additions, will update the pdfs tonight :thumb:

 

[Nele]

[quote author="[silent:arts]"][quote author="Nele"]2N6107 -> 1017665 leads to a BC214... Is this correct?[/quote]
of course not
thanks for the additions, will update the pdfs tonight :thumb:[/quote]

Haha, no problemo. The thing is, Farnell Europe doesn't have the 2N6107. You can get it from the US through Farnell (code 1126037 ), but it will cost an extra 25 euros.. :sad: . Is there a European equivalent or replacement?

Adios,
Corneel

 

[Jim50hertz]

RS carry it, part no 2509571479

Minimum order of 25 at 33p each tho :roll:

 

[edcorusa]

For those who are interested in a standard EI core power transformer, instead of a toroidal transformer, EDCOR has one to fit the PM660. The model number is XPWR063. It is not listed on their web site just yet.

 

[okgb]

I'm interested in the signal xfmrs needed
can you post that info with price break
[ N.A. grp buy anyone ? ]

Although the torroids can pass more high frequency garbage
the EI core often produce a mechanical hum of their own ,
besides the radiation , Do you know how your fair in this regard ?

 

[edcorusa]

The audio transformers, that most have been purchasing from EDCOR for the PM660, is the XSM600/10K and XSM10K/600. They are $12.94 for 1 to 9 and $12.44 for 10+, at the time of this post. There are also price breaks over 250pcs.

Yes, EI core transformers can produce a mechanical hum. The reasons for this can range from loose screws, not well varnished and pushing the transformer more then its maximum capabilities. As for EDCOR transformers, the only time any one has mentioned a mechanical hum was do to the fact that they were drawing more current then the transformer was rated for. This is very common on audio transformers for the sound. For power transformers some use a power transformer that is close to what they need and may draw a little more then what it is rated for. I have heard in a lot of cases that a slight tap of a hammer can quite it down, talk about tough love, but that is what I have heard. I am sure that many will disagree with me as this is all subjective.
:grin:

 

[emrr]

Probable corrections:

1 x 220n WIMA MKS2 C3
www.mouser.com
505-MKS2.022/63/10 should be 505-MKS20.22/63/5

1 x 1N4764 D7
www.mouser.com 78-1N6764A should be 78-1N4764A


...and this looks like a good Mouser substitute #:

4 x 100n/630V WIMA MKP4 or MKP10 C2,C4,C8,C10 (MKP10 26.5 x 7 x 16.5 mm 22.5 mm spacing)
www.mouser.com metallized polyester 505-MKS4.1/630/10P 26.5 x 6 x 15 mm 22.5 mm spacing

 

[mrclunk]

mr edcor,
do you have a price for the XPWR063?
Is it enclosed,or can it be?
seeing as i'll be getting the audio xforms from u guys may as well be powered by edcor too.

 

[elektrovolt]

is there any control for DC bias to control ratio /knee ?

 

[Grooveteer]

[quote author="Nele"][quote author="[silent:arts]"][quote author="Nele"]2N6107 -> 1017665 leads to a BC214... Is this correct?[/quote]
of course not
thanks for the additions, will update the pdfs tonight :thumb:[/quote]

Haha, no problemo. The thing is, Farnell Europe doesn't have the 2N6107. You can get it from the US through Farnell (code 1126037 ), but it will cost an extra 25 euros.. :sad: . Is there a European equivalent or replacement?

Adios,
Corneel[/quote]

Hi Nele,

Have you checked your local store? I checked with mine (Brigatti in Eindhoven) today and they have the 2N6107 in stock. I will going there tomorrow of maybe Friday, if you want I can buy one extra and ship it to you?

PM me if you want one.

Cheers,
G

 

[Nele]

Hi G,
Thanks, but I found that Futurlec also has them in stock. Only $4 shipping so I'll combine it with some other items I nead (for 1176D...).
Adios,
Corneel

 

[codered]

Anybody know why the FC670 gain is anti-clockwise.It was a std Daven right?

 

[no-fi]

[quote author="edcorusa"]For those who are interested in a standard EI core power transformer, instead of a toroidal transformer, EDCOR has one to fit the PM660.[/quote]

that sounds like a nice option for people who need to order the audio transformers direct from you, anyway...

will this transformer supply enough power to run a dual 660?
also - what voltage is the primary? my preference would be CT 230V, so it can run anywhere....

thanks!
:grin:

 

[emrr]

[quote author="codered"]Anybody know why the FC670 gain is anti-clockwise.It was a std Daven right?[/quote]

There's instructions for wiring Daven pots so input goes up and output down at the same time, for 'unity' operation. May or may not relate.

 

[jackies]

So what about tube subs?
It looks like 6BC8 can be subbed with 6BQ7, do you think that would work?
I have a bunch of those...
However I can't see what would be a good sub for 5687...
Any ideas?
:roll:

 

[[silent:arts]]

[quote author="emrr"][quote author="codered"]Anybody know why the FC670 gain is anti-clockwise.It was a std Daven right?[/quote]
There's instructions for wiring Daven pots so input goes up and output down at the same time, for 'unity' operation. May or may not relate.[/quote]
this instruction is only for "remote Threshold":
the original used a step attenuator, 1 dB per step, for input gain control.

 

[edcorusa]

[quote author="mrclunk"]mr edcor,
do you have a price for the XPWR063?
Is it enclosed,or can it be?
seeing as i'll be getting the audio xforms from u guys may as well be powered by edcor too.[/quote]

The XWPR is $56.65US.

The unit has a 115V or 230V (50/60Hz) primary with a 250V (200mA), 9V (6A) and a 15-0-15 (1A) secondaries. The XPWR063 is an open framed transformer with endbells.