Search found 3039 matches

by retroclinic
Thu Sep 12, 2019 3:50 pm
Forum: hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 40
Views: 1014

Re: Fixed: Mode 7 intermittent lines

Thanks for the info. I'm guessing you tried the RS 146-3926 . Given that I don't need that quantity, I've just ordered up a pack of 10 RS 814-9440 for £1.70 (including VAT & postage). Ony real difference I can see between the two is load capacitance, and frequency tolerance / stability. Assuming th...
by retroclinic
Thu Sep 12, 2019 3:21 pm
Forum: hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 40
Views: 1014

Re: Fixed: Mode 7 intermittent lines

However, as everything original in Beebs are now 30-35 years old, I will replace them from now on for the sake of 30p. Out of interest what crystal will you be using? Have you tried any of the HC-49US (I assume the S stands for small) package devices in place of the original HC-49U? The US package ...
by retroclinic
Thu Sep 12, 2019 1:13 pm
Forum: hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 40
Views: 1014

Re: Fixed: Mode 7 intermittent lines

Ok, been doing some testing on this today. I've tried several different new 16MHz crystals from different manufacturers in place of existing original crystals that were causing the re-sync issue on the converter, and any of the new type I've tried have been fine, and they've all been 30ppm. I've had...
by retroclinic
Wed Sep 11, 2019 9:13 am
Forum: hardware
Topic: Fixed: Mode 7 intermittent lines
Replies: 40
Views: 1014

Re: Fixed: Mode 7 intermittent lines

Interesting read, as I've also had jumping from several beebs using these ElCheapo converters. The 16MHz crystal you used, I looked at the eBay ad, but it doesn't mention the tolerance. Closest I can find in an HC49 case is 30ppm, I'm presuming this will be a more accurate version than that original...
by retroclinic
Mon Jul 08, 2019 8:31 am
Forum: for sale / freebies
Topic: BeebZIF kits now available
Replies: 13
Views: 1342

Re: BeebZIF kits now available

Still no forum PM, but I've just replied to your Facebook message. Thanks.
by retroclinic
Sun Jul 07, 2019 6:48 pm
Forum: for sale / freebies
Topic: BeebZIF kits now available
Replies: 13
Views: 1342

Re: BeebZIF kits now available

Hi, not seen a PM from you as yet, you can always email me, or contact me through my Facebook page of the same name. Thanks.
by retroclinic
Sun Jul 07, 2019 1:12 pm
Forum: for sale / freebies
Topic: BeebZIF kits now available
Replies: 13
Views: 1342

Re: BeebZIF kits now available

I've got 2 kits left, so if anyone else wants one, send me a PM! They are £30.00 plus postage.

Thanks, Mark.
by retroclinic
Sun Jul 07, 2019 8:19 am
Forum: for sale / freebies
Topic: BeebZIF kits now available
Replies: 13
Views: 1342

Re: BeebZIF kits now available

Yes I do still have a few left. Send me an eMail or PM and I'll sort you one out. Thanks.
by retroclinic
Wed Mar 13, 2019 4:56 pm
Forum: hardware
Topic: Master audio noise
Replies: 13
Views: 424

Re: Master audio noise

Hehe yes, that previous advice was from 2013, and is sort of a "hack" to reduce the HF noise passed to the LM386. Replacing the 3x Tant caps in that area, plus the LM324 seems to work in getting rid of 90% of the noise in most Masters. If it's still noisy, then change the LM386 amp as well. Thanks, ...
by retroclinic
Thu Sep 13, 2018 9:52 am
Forum: past events & exhibitions
Topic: ABUG EAST MIDLANDS (Leicester) 9-11 November 2018 - BOOKING NOW on THIS THREAD
Replies: 117
Views: 6742

Re: ABUG EAST MIDLANDS (Leicester) 9-11 November 2018 - BOOKING NOW on THIS THREAD

Pop me down for a walk in, probably just the Sunday.

If anyone wants spares / goodies etc. bringing along to save postage, please PM me here, or email / Facebook etc.

Thanks!
by retroclinic
Thu Aug 30, 2018 11:10 am
Forum: for sale / freebies
Topic: STH members eBay advice - buying & selling!
Replies: 38
Views: 14698

Re: STH members eBay advice - buying & selling!

Problem is, for years now, buyers CANNOT get negative feedback, only sellers. So a buyer can mess you about, and the sellers can't do jack about it. They can report the buyer, but eBay really gives very little if any toss as long as they're making their $$$.
by retroclinic
Mon Aug 27, 2018 2:44 pm
Forum: hardware
Topic: Gotek / Disk Problem ?
Replies: 29
Views: 998

Re: Gotek / Disk Problem ?

Hi.

Glad you got it sorted in the end. I'm now shipping them with that option set as default in the config file, as 1770 DFSs don't seem to care if it's on or off, it's only 8271s that are fussy.

Thanks, Mark.
by retroclinic
Mon Aug 27, 2018 7:03 am
Forum: hardware
Topic: Gotek / Disk Problem ?
Replies: 29
Views: 998

Re: Gotek / Disk Problem ?

Hi.

Great you got it working, but did you read the leaflet that came with it? This exact issue and the fix is mentioned in it.

Thanks, Mark.
by retroclinic
Mon May 07, 2018 10:55 pm
Forum: hardware
Topic: Case screws available anywhere?
Replies: 16
Views: 2949

Re: Case screws available anywhere?

Hi, yes I've got case screws, but the Beeb ones aren't identical, in that they're not black and have a standard screw head. They fit perfect though and are the same thread pitch! The Master ones I have are identical to the originals.

Thanks, Mark.
by retroclinic
Fri Dec 29, 2017 7:41 pm
Forum: hardware
Topic: Compatible DRAMS for BBC B
Replies: 14
Views: 2441

Re: Compatible DRAMS for BBC B

I've got DRAM in stock for all BBC Micro types, and others, including 4816 and 4164.

Thanks, Mark.
by retroclinic
Fri Dec 08, 2017 9:34 am
Forum: hardware
Topic: Problem Beeb MotherBoard
Replies: 69
Views: 3817

Re: Problem Beeb MotherBoard

I've read through the thread, but can't really follow where you are. You don't need a keyboard connected at all to get it to boot, just remove the System VIA - infact, to get an initial boot, remove both VIAs, 7002, Serial ULA, 6850 if socketed (worth removing it anyway if boot problems as they can ...
by retroclinic
Sun Sep 24, 2017 2:41 pm
Forum: past events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 15292

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Hi.

Confirming I'll come on the Sunday, but I'll probably be with no kit - unless anyone wants anything in particular.

Thanks, Mark.
by retroclinic
Tue Aug 01, 2017 10:02 am
Forum: software: other
Topic: Datacentre Copy ADFS Disc to USB Question
Replies: 42
Views: 6684

Re: Datacentre Copy ADFS Disc to USB Question

Basic programs on JGHs site are usually just BBC Tokenised BASIC, so drag it to the USB Stick, rename it 7 characters with no file extension, then just LOAD it from drive 5 on the DataCentre in BASIC.

Thanks, Mark.
by retroclinic
Wed Jul 26, 2017 3:57 pm
Forum: software: other
Topic: Datacentre Copy ADFS Disc to USB Question
Replies: 42
Views: 6684

Re: Datacentre Copy ADFS Disc to USB Question

,,,,,,The USB "drive" in the DataCentre is only visible to *CAT, *EXPORT and *IMPORT, it doesn't work as a filing system Erm..yes it does, in part.... so you can't save/load to it. Yes you can. It supports the OS calls that allow SAVE and LOAD, both as BASIC and *SAVE *LOAD etc. The only thing it d...
by retroclinic
Wed Jun 28, 2017 4:33 pm
Forum: software: new games
Topic: A new conversion for the BBC Micro
Replies: 18
Views: 4151

Re: A new conversion for the BBC Micro

Looks good, I'll try it a bit later. This looks like Fervour on the Arc?
by retroclinic
Sun Mar 12, 2017 6:25 pm
Forum: wanted
Topic: Master 128 Power supplies
Replies: 0
Views: 486

Master 128 Power supplies

Hi Folks.

I'm looking for one or two (or 10!) Master 128 Power supplies, if anyone has any going spare? They don't need to work, or be recapped etc., just as they are will be fine, as long as they're not too rusty?

Let me know if you have any.

Thanks, Mark.
by retroclinic
Sun Mar 12, 2017 6:23 pm
Forum: wanted
Topic: bbc master case ideally damaged
Replies: 2
Views: 946

Re: bbc master case ideally damaged

Hi. Yes, I've got Master cases if you want them. Cosmetically challenged, but not damaged or with etched in security marks, just yellowed somewhat and some have painted or written on markings.

Thanks.
by retroclinic
Wed Mar 01, 2017 9:06 pm
Forum: hardware
Topic: Using OS 1.2 etc on a BBC Master ?
Replies: 33
Views: 7283

Re: Using OS 1.2 etc on a BBC Master ?

Any joy on the patched ADFS 1.32 for the Master - the one where the floppies work as well as the IDE in Model B mode?

Thanks.
by retroclinic
Wed Mar 23, 2016 4:05 pm
Forum: for sale / freebies
Topic: BBC Micro Male AUX Power connectors
Replies: 0
Views: 719

BBC Micro Male AUX Power connectors

Hi Folks.

I've now got stock of the male power connectors to fit the socket under the Beeb and Master. They are for sale singly on fleabay:

http://www.ebay.co.uk/itm/262348907853

Or if you want multiple quantities, I can do a better price.

Thanks, Mark.
by retroclinic
Wed Oct 14, 2015 6:40 pm
Forum: for sale / freebies
Topic: Model B+128K Boxed Immactulate
Replies: 2
Views: 1136

Model B+128K Boxed Immactulate

Hi Folks. I've just listed my one and only immaculate BBC Model B+128 boxed, fully working, refurbished, no yellowing or damage to the case. Caps replaced etc. Proper collectors one this with matching serial numbers on the box. Not cheap, but these don't come up that often. http://www.ebay.co.uk/itm...
by retroclinic
Wed Jul 01, 2015 4:20 pm
Forum: software: other
Topic: Using the beebs TMS5220 Speech chip without a ROM
Replies: 25
Views: 3305

Re: Using the beebs TMS5220 Speech chip without a ROM

Doesn't the Computer Concepts Speech ROM (not to be confused with the Superior software SPEECH! one) talk directly to the 5220? Does it need a 6100 in there as well?

Mark.
by retroclinic
Wed Jun 03, 2015 10:04 am
Forum: hardware
Topic: How to eject a Canon MDD221
Replies: 4
Views: 1097

Re: How to eject a Canon MDD221

In the area highlighted is a solenoid, and on the actuator is a small rubber bush that is meant to smooth it's operation. This bush perishes over time. For those drives, I've just simply removed the solenoid completely as it just serves to load the heads onto the drive, something which later drives ...
by retroclinic
Thu May 14, 2015 9:06 am
Forum: hardware
Topic: bbc b psu problem
Replies: 8
Views: 1122

Re: bbc b psu problem

There are two 100uF caps to replace if the -5v is out of spec. Don't have the diagram infront of me, but they're the only two of that value on the output side. Use low ESR for the least noise on the sound line. You can get them at Maplins, CPC, etc, or I've got them if you need to be sure of getting...
by retroclinic
Tue Apr 21, 2015 10:43 pm
Forum: software: other
Topic: US Beeb (UNB09) Welcome disk
Replies: 5
Views: 1039

Re: US Beeb (UNB09) Welcome disk

It looks like an original, yes. Label certainly doesn't look like a repro, and is inline with the B+ Utility disk.
IMG_0480.JPG
Mark.
by retroclinic
Tue Apr 21, 2015 9:42 pm
Forum: software: other
Topic: US Beeb (UNB09) Welcome disk
Replies: 5
Views: 1039

US Beeb (UNB09) Welcome disk

Hi Folks. I've come across a Welcome disk that is different, and I think it's the original one for the US Beebs. I say that because some of the programs seem to run in screen modes that only use 3/4 of the screen, as if they were NTSC modes? Also, the title screen says "Acorn Computer", similar to t...