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Author Topic: SSFP Mk 3  (Read 70029 times)

Chrysalis

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Re: SSFP Mk 3
« Reply #30 on: September 10, 2014, 11:55:27 AM »

I probably wont be using my mk3 unless a new line problem manifests itself sorry guys.
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Ronski

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Re: SSFP Mk 3
« Reply #31 on: September 10, 2014, 06:39:49 PM »

I ordered one last night, so I shall see what difference it makes to my line when it arrives.
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burakkucat

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Re: SSFP Mk 3
« Reply #32 on: September 11, 2014, 05:27:42 PM »

The replacement Mk3 SSFP arrived this morning and so the damaged one was opened up and its PCB was photographed. The image is attached below, along with that of a Mk2 SSFP's PCB.

It's let us play "spot the difference" time.  ::)
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Chrysalis

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Re: SSFP Mk 3
« Reply #33 on: September 11, 2014, 05:58:39 PM »

also those four small tube type things at top are different colour
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HPsauce

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Re: SSFP Mk 3
« Reply #34 on: September 11, 2014, 06:01:51 PM »

Resistors.  ;)
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NewtronStar

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Re: SSFP Mk 3
« Reply #35 on: September 11, 2014, 06:07:38 PM »

Looks like it has more windings on the ferrite core on the MK3
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burakkucat

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Re: SSFP Mk 3
« Reply #36 on: September 11, 2014, 06:20:03 PM »

also those four small tube type things at top are different colour

Although the body colours are different, the bands designating the resistance are the same. (I see red, black, black, gold which shows them as 20 Ohm +/- 5%)
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burakkucat

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Re: SSFP Mk 3
« Reply #37 on: September 11, 2014, 06:24:06 PM »

Looks like it has more windings on the ferrite core on the MK3

Yes, indeed. The two windings on that toroid are in series with the A & B wires of the circuit, immediately following the plug which connects to the NTE5/A.
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NewtronStar

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Re: SSFP Mk 3
« Reply #38 on: September 11, 2014, 06:44:22 PM »

Looks like it has more windings on the ferrite core on the MK3

Yes, indeed. The two windings on that toroid are in series with the A & B wires of the circuit, immediately following the plug which connects to the NTE5/A.

Thats going to add a bit more attenuation to the line not by that much say 1.0 to 1.5 dB but suspect it will be higher than the MK2 which added 0.5dB to the attenuation :-\
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les-70

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Re: SSFP Mk 3
« Reply #39 on: September 11, 2014, 07:02:59 PM »

When swapping between the mark 2 and mark 3 on an Hg612 there was no change in my over all attention or sync. pbParams showed no changes in D1 and D2 and a consistent 0.4 db increase in D3.  in U1,U2 and U3 there were some 0.1 db increases in some values but nothing significant.  With the HG612 there was nothing really significant at all.  A 1 day test suggested a smaller error rate reduction but my error rates are not really stable enough to allow a reliable judgment.
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Semmy

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Re: SSFP Mk 3
« Reply #40 on: September 11, 2014, 07:09:18 PM »

The guys at BT Harrogate are aware of the issue (as in issuing out of the stores) of the Mk3 SSFP so it is definitely legit item.

(edited for clarity)
« Last Edit: September 12, 2014, 10:11:13 PM by Semmy »
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Black Sheep

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Re: SSFP Mk 3
« Reply #41 on: September 11, 2014, 07:52:22 PM »

What the issue, Semmy ??
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Chrysalis

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Re: SSFP Mk 3
« Reply #42 on: September 11, 2014, 08:23:49 PM »

so MK4 incoming?
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Black Sheep

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Re: SSFP Mk 3
« Reply #43 on: September 11, 2014, 08:36:53 PM »

 :lol:
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burakkucat

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Re: SSFP Mk 3
« Reply #44 on: September 11, 2014, 09:07:48 PM »

The guys at BT Harrogate are aware of tge issue of the Mk3 SSFP so it is definitely legit issue.

Me thinks that you intended to paw out "issue of the Mk2 SSFP", as that is the device of which the Wizards of Grimbledon Down1 were tasked to "look again". The Wizards looked, changes were made and the Mk3 SSFP is the result.

Of course the Mk3 could, in turn, be lacking!  ::)

1Adastral Park
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