He added that this second transcript would probably be released on Tuesday.
He also said he is thinking about revealing information from a first telephone call he had last April with Ukrainian President Volodymyr Zelensky.
House committees are trying to determine whether President Donald Trump violated his oath of office by asking Ukraine to investigate political rival Joe Biden and his family and to investigate Ukraine's involvement in the 2016 US presidential election.
House Republicans, in their ever-increasing efforts to disrupt congressional impeachment proceedings, have thrown one more curveball into the mix.
House Intelligence Committee Chairman Adam Schiff rejected the GOP's request that the panel summon Vice President Joe Biden's son, Hunter Biden, to testify at public impeachment hearings next week.
"I believe it's inappropriate for a president to ask a foreign leader to investigate a political rival".
The California Democrat also signaled he will not agree to some of the other witnesses Republicans requested Saturday, including Alexandra Chalupa, a former Democratic National Committee staffer who Republicans said worked with the Ukrainian Embassy in Washington, D.C., "to try to get political dirt on then-candidate Trump's campaign". Trump also called on Zelensky to probe a debunked conspiracy theory that Democratic servers hacked during the 2016 election are in Ukraine.
Investigators in the inquiry on Friday released hundreds of pages of testimony from Fiona Hill, a former White House Russia adviser, and Lt. Col. Alexander Vindman, an Army officer assigned to the National Security Council.
The inquiry enters a critical phase next week when House committees hold impeachment hearings in public.
U.S. President Donald Trump talks to reporters before boarding Marine One and departing the White House in Washington, on November 08, 2019. Trump said Saturday he has no problem making details of that call public.
But he vowed the inquiry would not be "a vehicle to undertake the same sham investigations into the Bidens... that the president pressed Ukraine to conduct for his personal political benefit".
Ambassador William Taylor, a diplomat to Ukraine, and George Kent, deputy assistant secretary for European affairs, are scheduled to testify on November 13, while Marie Yovanovitch, the former USA ambassador to Ukraine, will testify on November 15, according to Schiff.