[minima] Re: Minima PCB (eagle cad's)
- From: gurudatta panda <gurudattabam@xxxxxxxxx>
- To: minima@xxxxxxxxxxxxx
- Date: Tue, 28 Jan 2014 19:11:10 +0530
@Sandeep- no problem with mounting the .25 watt resistors vertically, hole
size of 0.8 or 1mm will be preferable from my side, Pot style trimmer will
be preferable (3 Pin) instead of the trimmers currently used as
availability matters. the VFO in and PA out can be changed to any other
connector as these may not be available to all. Rest is good to exp with
and off course a hobby knife will come to rescue if something goes wrong.
For Crystal matching, I prefer to buy Crystal from a single batch and test
it for max chances of matching.
On Tue, Jan 28, 2014 at 5:35 PM, Lawrence Galea <9h1avlaw@xxxxxxxxx> wrote:
> Guess the holes have to be suitable for the components otherwise it will
> not make sense to have them undersize and then have to enlarge them with
> the risk of damaging the tracks.
>
> Horizontal resistors and other components would be preferable even though
> they will increase the board size.
> After all, it will make easier construction and less likely to short
> components together when testing.
>
> Re trimmers etc, you can make the footprint such that different ones can
> be used which normally only entails a slightly bigger footprint for the
> trimmers
>
> As for BPF's seeing that theoretically it will cover from 0 kHz up, apart
> from the HF ones including 160M, is it possible to make ones for the
> 472-479 kHz and the 136 kHz bands.
>
> Granted that the 472-479kHz and 136kHz bands are cw only and the filter is
> rather wide, but there is a possibility that it may be usable especially if
> the user includes an AF filter. Possibly, someone could also design a
> narrow band cw filter and include filter switching which would make Minima
> more attractive.
>
> Last question for now Sandeep.
> Are you or Farhan going to make a full kit available?
> Regards
> Lawrence
>
>
> On Tue, Jan 28, 2014 at 11:37 AM, Adrian Preda <ady.preda@xxxxxxxxx>wrote:
>
>> For factory made PCBs I belive 0.066 pads will be just fine, maybe 0.07,
>> and I should modify only the holes.
>>
>> I will make 1mm, 0.039 inches, for 1n4007, trimmers, pot trimmer and
>> maybe pads.
>> and for the rest of holes, 0.8mm, 0.0312 inches.
>>
>> ------------------------------
>> *From:* "jerry@xxxxxxxxxxxxxxxx" <jerry@xxxxxxxxxxxxxxxx>
>> *To:* minima@xxxxxxxxxxxxx
>> *Sent:* Tuesday, January 28, 2014 12:16 PM
>>
>> *Subject:* [minima] Re: Minima PCB (eagle cad's)
>>
>> Adrian, I drilled out the digital board and the serial board with a #67
>> bit, that's 1/32 of an inch or .0312, and it worked out ok. There is
>> still a good amount of pad to solder to and the little .023 trace
>> indentations on the board act like a countersink for drilling. All the
>> part leads fit into that hole nicely. Jerry K5LRU
>>
>>
>> -------- Original Message --------
>> Subject: [minima] Re: Minima PCB (eagle cad's)
>> From: Adrian Preda <ady.preda@xxxxxxxxx>
>> Date: Tue, January 28, 2014 2:30 am
>> To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx>
>>
>> Hi MinTeam,
>>
>>
>> 0.25W resistor mounted horizontally will increase the board size and
>> thus the all layout must be modified. If you mount vertical it will be
>> ok.
>> About hole and pads. Based on Adam's merged boards that he uploaded to
>> github I will try to modify them. I am not sure I can because now the
>> new layout is more than 10x8cm (Eagle Light restriction) and hope it
>> allows me to do modificatios. Yes, I tried in the past cracked Eagles,
>> but were full of bugs, errors, program crashes...
>>
>>
>> What hole sizes do you guys like, 0.8mm or 1mm?
>> Pads are now 0.066 inches (1.67 mm), should I try 0.07 (1.77mm)? I will
>> try also (0.78) 2mm but not sure if enough space.
>>
>>
>> @Sandeep
>>
>> PCBs are factory made? If so please add me with 2 to the list, and if
>> you are ok with sending it outside VU of course.
>>
>>
>> And also we must decide about the JBOT, LPFs and a swtiching circuit.
>>
>>
>> I propose 4(5) LPFs with 5 poles (two toroids):
>> 80m
>>
>> 40/30m
>> 20/17/15m
>> 12/10m
>> optional 160m
>>
>>
>> Adrian
>> YO4HHP
>>
>>
>> From: Sandeep Lohia <sandeeplohia12@xxxxxxxxx>
>> To: minima@xxxxxxxxxxxxx
>> Sent: Tuesday, January 28, 2014 9:44 AM
>> Subject: [minima] Re: Minima PCB (eagle cad's)
>>
>>
>> Haha ha!
>> Here happened just opposite :D
>> Friends, here I only wanted to know about modifications @ Eagle CAD :
>>
>> 1) Changing MFR to bigger 1/4 watt, or vertical mount is OK ?
>> 2) U guys OK with relays G5V 2 & G5V 1 ?
>> 3) Pads & Holes definitely needs to me made bigger...
>> 4) And what about trimmers & capacitors? Will do as majority prefers...
>>
>> Right Sudarmanta-YC1, 'One World One Language' & I'll be more than
>> happy to help! in whatever way I can...
>>
>> Thanks Jerry-K5, all points noted, personally I too prefer my stuff
>> small, willing to hear more from U & from others. Before I finally
>> order boards tomorrow by second-half, or can wait MAX by Friday...
>>
>>
>> -----------------------------------------------------------------------------------------
>> Matched diodes will be gift with PCB, from my end. (I got new
>> DMP+vacter diode analyzer)
>>
>> ------------------------------------------------------------------------------------------
>> Matching 4 XTAL was easy but now 8 ???
>> lets make a group of 4~5 Amateurs & distribute among our-self, thus
>> save unnecessary waste...
>> (your neighbor might not have a counter)
>>
>> --------------------------------------------------------------------------------------------------------------------------------
>> And as Farhan, Adrian, Jerry & others have checked PCB is correct, &
>> we can do little hobby knife if required. ( to substitute components)
>> Again this is on experimental basis ( will distribute in costing
>> price, non profit / non commercial)
>> I pre-assume PCB approx 2~3 US $ each...
>>
>> I have Eagle installed in my desktop, but not as expert as Adrian,
>> might depend on vedor if any small critical modification.
>>
>> Finally we should be really thankful to both Farhan & Adrian for their
>> hard work, & promote this hobby, & looking further updates from their
>> end.
>>
>> On 28/01/2014, Lawrence Galea <9h1avlaw@xxxxxxxxx> wrote:
>> > Sandeep,
>> > Mans and myself are interested in two pcb each, that is 4 in number if
>> you
>> > can send them to Malta.
>> > Thanks and regards
>> > Lawrence
>> >
>> >
>> > On Mon, Jan 27, 2014 at 7:01 PM, Jon Lee G4TSN <g4tsn@xxxxxxxxxxx>
>> wrote:
>> >
>> >> Hi
>> >> Interested in PCB's if you can send them to UK ?
>> >>
>> >> 73,
>> >>
>> >> Jon G4TSN
>> >>
>> >>
>> >>
>> >> ----- Original Message ----- From: "Sandeep Lohia" <
>> >> sandeeplohia12@xxxxxxxxx>
>> >> To: <minima@xxxxxxxxxxxxx>
>> >> Cc: "Sunil Thomas Thonikuzhiyil" <vu2swx@xxxxxxxxx>
>> >> Sent: Monday, January 27, 2014 7:10 AM
>> >>
>> >> Subject: [minima] Re: Minima PCB (eagle cad's)
>> >>
>> >>
>> >> Many VUs (known friends) already asked me about MINIMA PCB (those not
>> >>> comfortable with ferrite chloride or drilling holes, but already in
>> >>> love with bidirectional stage)
>> >>>
>> >>> Going to order 10 PCB ( will distribute in costing price, non profit /
>> >>> non commercial)
>> >>> I pre-assume approx Rs 150/- each...
>> >>>
>> >>>
>> >>> Other VU hams, plzz mail me personal (more PCB will decrease costing
>> >>> of films etc)
>> >>>
>> >>> Suggestions welcome if need any change (with substitute component) or
>> >>> bigger holes, PTH etc...
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> Hello Sandeep,
>> >>>> How about printing some minima pcbs on an experimental basis.
>>
>> >>>>
>> >>>>
>> >>>
>> >>
>> >
>>
>>
>> --
>> --
>> Please encourage recycling, reuse or repairing of E-waste.
>> ░7░3░ ░d░e░ ░V░U░3░S░X░T░
>>
>>
>>
>
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