Maplin UHF Modulator Dip Switch Settings info Request - UK Vintage Radio Repair and Restoration Discussion Forum

Focus Diode · 12th Jun 2013, 10:51 am

These excellent units are well known, as we know any of the channels 21-68 can be selected by altering the dip switch settings. The unit comes with instructions giving all the combinations.

Unfortunately I seem to have mislaid my instruction guide. Could anyone please upload them or at least give the combination for UHF CH64? This would be much appreciated. Now analogue has ended I wish to set mine to ch64, the original BBC2 Pontop Pike channel 1966-2012.

Many thanks,
Brian

Stuart R · 12th Jun 2013, 1:04 pm

Hello Brian,

Here are the DIP switch settings for the Maplin VH89, I think that is the one.

SWITCH 1 2 3 4 5 6 7 8
Ch 64 1 0 1 0 1 1 - x (815.25MHz)

On=1, Off=0, X=0 Video In; 1=Test

Regards,

Stuart.

Stuart R · 12th Jun 2013, 1:04 pm

Column formatting lost in the post -hope it makes sense!

Dave Moll · 12th Jun 2013, 2:23 pm

In case it helps, here is a version with the formatting restored:

Code:

SWITCH   1  2  3  4  5  6  7  8
Ch 64    1  0  1  0  1  1  -  x   (815.25MHz)

On=1, Off=0, X=0 Video In; 1=Test

Focus Diode · 12th Jun 2013, 5:04 pm

Thank you very much to the both of you!

Cheers,
Brian

FERNSEH · 12th Jun 2013, 6:08 pm

Hi Brian,
Not very good copies but here's the complete list of modulator settings. I assume your modulator is the same as mine, the model VH89.

Regards,
David.

Focus Diode · 12th Jun 2013, 7:11 pm

Hi David,

They came through clear as a bell at this end. My very many thanks!

Cheers,
Brian

julie_m · 12th Jun 2013, 8:17 pm

Or, to put it another way:

Subtract 21 from desired channel number. Set switches 1-6 to that number's binary equivalent. (Reading left to right; so 6 = units, 5 = twos ... 1 = thirty-twos.)

Stuart R · 13th Jun 2013, 12:05 pm

Ah...I see it now...never really looked at the switch settings in such detail before!

colourking · 15th Jun 2013, 9:42 am

Expect Ch 64 to be troublesome when 800 MHz LTE starts up. Even if no terresterial aerial is looped through there may well be enough ingress to cables/or the TV to cause interference to the modulator output. Be prepared to move channel again. Post a message here if /when you notice any interference.

crusher19860138 · 15th Jun 2013, 10:28 am

We have had a card come through our letterbox this week about 800Mhz interference,it says a free filter can be sent free of charge if you experience it!

Focus Diode · 18th Jun 2013, 3:00 pm

Many thanks to you all for your interesting replies. Colourking- thanks for letting me know. No problems at this end so far.

Cheers,
Brian

12th Jun 2013, 10:51 am	#1
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Maplin UHF Modulator Dip Switch Settings info Request These excellent units are well known, as we know any of the channels 21-68 can be selected by altering the dip switch settings. The unit comes with instructions giving all the combinations. Unfortunately I seem to have mislaid my instruction guide. Could anyone please upload them or at least give the combination for UHF CH64? This would be much appreciated. Now analogue has ended I wish to set mine to ch64, the original BBC2 Pontop Pike channel 1966-2012. Many thanks, Brian

12th Jun 2013, 1:04 pm	#2
Stuart R Heptode Join Date: May 2011 Location: Letchworth Garden City, Hertfordshire, UK. Posts: 693	Re: Maplin UHF Modulator Dip Switch Settings info Request Hello Brian, Here are the DIP switch settings for the Maplin VH89, I think that is the one. SWITCH 1 2 3 4 5 6 7 8 Ch 64 1 0 1 0 1 1 - x (815.25MHz) On=1, Off=0, X=0 Video In; 1=Test Regards, Stuart.

12th Jun 2013, 1:04 pm	#3
Stuart R Heptode Join Date: May 2011 Location: Letchworth Garden City, Hertfordshire, UK. Posts: 693	Re: Maplin UHF Modulator Dip Switch Settings info Request Column formatting lost in the post -hope it makes sense! Last edited by Stuart R; 12th Jun 2013 at 1:05 pm. Reason: Spelling.

12th Jun 2013, 2:23 pm	#4
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,133	Re: Maplin UHF Modulator Dip Switch Settings info Request In case it helps, here is a version with the formatting restored: Code: SWITCH 1 2 3 4 5 6 7 8 Ch 64 1 0 1 0 1 1 - x (815.25MHz) On=1, Off=0, X=0 Video In; 1=Test __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)

12th Jun 2013, 5:04 pm	#5
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Re: Maplin UHF Modulator Dip Switch Settings info Request Thank you very much to the both of you! Cheers, Brian

12th Jun 2013, 6:08 pm	#6
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Maplin UHF Modulator Dip Switch Settings info Request Hi Brian, Not very good copies but here's the complete list of modulator settings. I assume your modulator is the same as mine, the model VH89. Regards, David. Attached Thumbnails

12th Jun 2013, 7:11 pm	#7
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Re: Maplin UHF Modulator Dip Switch Settings info Request Hi David, They came through clear as a bell at this end. My very many thanks! Cheers, Brian

12th Jun 2013, 8:17 pm	#8
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: Maplin UHF Modulator Dip Switch Settings info Request Or, to put it another way: Subtract 21 from desired channel number. Set switches 1-6 to that number's binary equivalent. (Reading left to right; so 6 = units, 5 = twos ... 1 = thirty-twos.) __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.

13th Jun 2013, 12:05 pm	#9
Stuart R Heptode Join Date: May 2011 Location: Letchworth Garden City, Hertfordshire, UK. Posts: 693	Re: Maplin UHF Modulator Dip Switch Settings info Request Ah...I see it now...never really looked at the switch settings in such detail before!

15th Jun 2013, 9:42 am	#10
colourking Pentode Join Date: Nov 2007 Location: Cork, Ireland Posts: 136	Re: Maplin UHF Modulator Dip Switch Settings info Request Expect Ch 64 to be troublesome when 800 MHz LTE starts up. Even if no terresterial aerial is looped through there may well be enough ingress to cables/or the TV to cause interference to the modulator output. Be prepared to move channel again. Post a message here if /when you notice any interference.

15th Jun 2013, 10:28 am	#11
crusher19860138 Hexode Join Date: Sep 2010 Location: Stourbridge, West Midlands, UK. Posts: 434	Re: Maplin UHF Modulator Dip Switch Settings info Request We have had a card come through our letterbox this week about 800Mhz interference,it says a free filter can be sent free of charge if you experience it!

18th Jun 2013, 3:00 pm	#12
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Re: Maplin UHF Modulator Dip Switch Settings info Request Many thanks to you all for your interesting replies. Colourking- thanks for letting me know. No problems at this end so far. Cheers, Brian