Q. Are the Dead Sea Scrolls based on the Textus Receptus, the Vaticanus, or the Sinaiticus manuscripts?

A. The Dead Sea Scrolls discovered in mid 1900, but dated back circa 4th century BC, predates the Codex Vaticanus (early 4th century), Codex Sinaiticus (mid 4th century) and the Textus Receptus (1516). Therefore it is not based on those translations. The Dead Sea Scrolls are the work of the scribes in Qumram, who have been recopying and preserving the Hebrew texts. They are, to this date, the earliest surviving manuscripts of the Old Testament. The dead sea scrolls are in harmony with the Masoretic text of the old testament which is the text used by the KJV translators. 

While the Vaticanus and the Sinaiticus contains both Old and New Testament in Greek, the Textus Receptus only contains the New testament in Greek. The Dead Sea Scrolls on the other hand only contain portions or fragments of the Old Testament in the original Hebrew. Scholars have concluded that the KJV translation of the Hebrew is extremely accurate and only has a few minor diferences in punctuation and in some small words that do not change the meaning of the text. But what's more important is that the Hebrew Manuscript of the Dead Sea Scrolls would most likely have been the same texts used by Jesus when He read in the Synagogues. 

For more information we recommend the following resources:

Bible Versions, Does It Really Matter Which?

Battle of the Bibles (Total Onslaught)

Changing the Word (Total Onslaught)

Keywords: Dead Sea Scroll, Codex Vaticanus, Codex Sinaiticus, Textus Receptus, Greek Text, Hebrew Text, Manuscript, Qumram, Bible versions,