Re: Is it at all possible?

no problemo

if i got hold of one original i would just measure that one and pick one
that gets as close to that

2017-02-19 22:50 GMT+01:00 Mike Stein <mhs.stein@gmail.com>:

> Re the common mode choke unless you can find its value specified in a
> Commodore parts list you'd have to test it, but something like that is
> pretty hard to test; it depends on the material of the toroid, the number
> of turns, and the wire gauge.
>
> FWIW, looks like about 17-18 turns on the original.
>
> Nevertheless, I'd think that anything with more or less the same number of
> turns of fairly heavy wire and resistance in the low milliohms would do
> just fine; e.g. eBay item 231497118977.
>
> Or you could just forget about it and put in a couple of jumper wires...
>
> m
>
> ----- Original Message -----
>
> *From:* Bo Herrmannsen <bo.herrmannsen@gmail.com>
> *To:* cbm-hackers@musoftware.de
> *Sent:* Sunday, February 19, 2017 3:19 PM
> *Subject:* Re: Is it at all possible?
>
> so did go through BOM again to try and shave of some cost
>
> still missing:
>
> 6526
> 6581
> Line Filter
> Crystal
> can the 2 first be programmed in a new chip like some of the others can?
> sorry for asking so daft but it could then be an option
>
> it has been said that the line filter is not that critical, but anyone
> that has some info on it?
>
> crystal, strange as it might sound i looked for it at RS Components and
> Mouser but could not find it
>
>
>
> 2017-02-19 0:26 GMT+01:00 Mike Stein <mhs.stein@gmail.com>:
>
>> Sounds like it's really well covered ;-)
>>
>> FWIW, the three boards I found at a fast look through the pile are also
>> all Rev A.
>>
>> m
>>
>> ----- Original Message -----
>> *From:* Nick Vivid <nickvivid@gmail.com>
>> *To:* cbm-hackers@musoftware.de
>> *Sent:* Saturday, February 18, 2017 5:38 PM
>> *Subject:* Re: Is it at all possible?
>>
>> I have 2 326298 rev a boards I don't mind hacking apart and taking
>> pictures of in the name of science. Let me know if you guys need anything.
>>
>>
>>
>> On Feb 18, 2017 3:45 PM, "Bo Herrmannsen" <bo.herrmannsen@gmail.com>
>> wrote:
>>
>> YES
>>
>> that pic helped me solve the dammn RP4 mystery..
>>
>> on the schematic R51 should have been labeled RP4...
>>
>> it connects to pin 4 of the expansion port which on the pic goes to Rp4
>>
>>
>>
>> 2017-02-18 20:39 GMT+01:00 Santo Nucifora <santo.nucifora@gmail.com>:
>>
>>> I added head-on pics of the 326298 Rev A and C boards. Sadly, the back
>>> has a metal shield soldered onto both boards that will be difficult to
>>> remove and I'd like to keep these as working boards so front pics only.
>>>
>>> On Sat, Feb 18, 2017 at 2:31 PM, Gerrit Heitsch <
>>> gerrit@laosinh.s.bawue.de> wrote:
>>>
>>>> On 02/18/2017 08:15 PM, silverdr@wfmh.org.pl wrote:
>>>>
>>>>>
>>>>> On 2017-02-18, at 09:36, smf <smf@null.net> wrote:
>>>>>>
>>>>>> "The sweet spot is a 250466 board
>>>>>>
>>>>>
>>>>> Precisely…
>>>>>
>>>>> The VIC chip on those boards is a R5, which gives the clearest
>>>>>> picture. "
>>>>>>
>>>>>
>>>> Not quite... You can get a clear picture from a 6569R1, 6569R3 or
>>>> 6569R4 (that one is rather rare) as well. The problem on the older boards
>>>> is mostly the modulator. Replace it with a simple video amp and you will
>>>> have a very good picture. Ok, you lose the RF output, but who is using that
>>>> anymore?
>>>>
>>>>
>>>> It also has the 8 pin video port, not 5 pin like the earlier ones.
>>>>>>
>>>>>
>>>>> Which is also not fully correct. Should read "like some of the earlier
>>>>> ones". Not all earlier boards had 5-pin A/V socket.
>>>>>
>>>>
>>>> Even the old KU board already has the 8pin Video out.
>>>>
>>>>  Gerrit
>>>>
>>>>
>>>>
>>>>
>>>>       Message was sent through the cbm-hackers mailing list
>>>>
>>>
>>>
>>
>>
>


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