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<blockquote data-quote="baruffaldi" data-source="post: 1879">Since my last posting I received the following email from Martin Pickering of Satcure .....&quot;Recently,&nbsp; I've&nbsp; had&nbsp; several&nbsp; reports&nbsp; of&nbsp; LNBs&nbsp; being&nbsp; &quot;allergic&quot; to certain receivers for Astra 2D - especially Panasonic. Low&nbsp; band Astra 2D programmes are simply reported&nbsp; as &quot;No signal...&quot;.&nbsp; It seems&nbsp; to me that the receiver is probably sending interference&nbsp; at a&nbsp; frequency of about 22kHz up the LNB cable. The &quot;Alps&quot; LNB does seem prone&nbsp; to this.It&nbsp; may&nbsp; be more&nbsp; sensitive to&nbsp; a low-level 22kHz&nbsp; signal or&nbsp; it mightaccept a wider frequency range up to, say, 30kHz.This might be&nbsp; fixable by connecting&nbsp; a 100uF/35v&nbsp; electrolytic acrossthe LNB voltage supply where&nbsp; it leaves the&nbsp; power supply.&nbsp; You'd haveto locate the&nbsp; correct pin&nbsp; by measurement. It&nbsp; will have&nbsp; the 13v/18vsupply on it.But&nbsp; you'd also have&nbsp; to make&nbsp; sure that the&nbsp; 22kHz tone&nbsp; generator is*not*&nbsp; incorporated&nbsp; in&nbsp; the&nbsp; power&nbsp; supply&nbsp; (as&nbsp; it&nbsp; is&nbsp; in Grundigs)otherwise you'll cut that out, too!&quot;I was in Montpellier on hols over the last two weeks and I have replaced the Alps LNB with a Phillips LNB.&nbsp; Now, I can receive all 2D channels without any problems.&nbsp; I was well pleased since this &quot;upgrade&quot; has proven to be less hassle and less cost than replacing the dish with a 80cm or greater.Baruffaldi</blockquote>

[QUOTE="baruffaldi, post: 1879"] Since my last posting I received the following email from Martin Pickering of Satcure ..... "Recently, I've had several reports of LNBs being "allergic" to certain receivers for Astra 2D - especially Panasonic. Low band Astra 2D programmes are simply reported as "No signal...". It seems to me that the receiver is probably sending interference at a frequency of about 22kHz up the LNB cable. The "Alps" LNB does seem prone to this. It may be more sensitive to a low-level 22kHz signal or it might accept a wider frequency range up to, say, 30kHz. This might be fixable by connecting a 100uF/35v electrolytic across the LNB voltage supply where it leaves the power supply. You'd have to locate the correct pin by measurement. It will have the 13v/18v supply on it. But you'd also have to make sure that the 22kHz tone generator is *not* incorporated in the power supply (as it is in Grundigs) otherwise you'll cut that out, too!" I was in Montpellier on hols over the last two weeks and I have replaced the Alps LNB with a Phillips LNB. Now, I can receive all 2D channels without any problems. I was well pleased since this "upgrade" has proven to be less hassle and less cost than replacing the dish with a 80cm or greater. Baruffaldi [/QUOTE]

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